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You do not want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. and well respond with an offer almost on the spot. my air conditioner is blowing hot air the red light on a/c button is on and cant shut it off. Does someone know what the issue is? A common symptom of a faulty blend door actuator in vehicles with dual zone climate control system is one side blowing hot air while the other side is blowing cold air. }, You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. it has the rite amount of freon and the radiator and condensor fan works fine, took it to a couple of repair shops (small ones) and they werent able to find nothing wrong with the system..need some But there are going to be some instances in which you should give a Mercedes air conditioning reset a whirl to see if it gets your cars AC system up and running like normal again. please help its 105 degrees today. 2022 Cash Cars Buyer. on your cars ability to produce cool air. After that, the refrigerant goes through the expansion valve. Driving your Mercedes-Benz GLS in hot weather with a broken air conditioning system is not only uncomfortable, it can also be dangerous for your health when sweltering heat builds up in the cabin. the system is charged, but the compressor is not Ask an Expert Car Questions Mercedes Repair Marty, Mercedes Technician 57,141 Satisfied Customers Bosch Certified Master Tech. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. Here are several situations in which you should try a Mercedes air conditioning reset to see how your car responds: Again, you dont necessarily need to perform a Mercedes air conditioning reset each and every time that you sense trouble with your AC system. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. 75 Answers. Keep reading to discover more about what a Mercedes air conditioning reset is and how exactly one is done. 1992 mercedes-benz 500sl. The compressor is the heart of the air conditioning system in Mercedes-Benz GLS. If the refrigerant level goes down again quickly, it means there is probably a leak. Therefore, the filter performance will not increase significantly even after cleaning. If you dont service the AC system in your GLE for a long time, the refrigerant level will eventually get so low that the system loses its cooling capacity. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. Next in the system is the receiver-drier, whose primary purpose is to remove moisture from the A/C refrigerant. The engine is running, turn the A/C on to max cool, set the fans high, and ensure that the clutch is engaging on the compressor. The operation of the A/C in your car is based on the First Law of Thermodynamics if you want to learn the physics behind it. JavaScript is disabled. If you see any error code from P0530 to P0533 after connecting the diagnostic device to your GLS, it indicates a problem with the AC pressure switch. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. Leaks are the most common problem associated with the air conditioning system. Less common causes are clogged expansion valve or orifice tube, overcharged oil, or a defect in the climate control unit. Youre going to need to locate each of these buttons and then press them and hold them down for somewhere between 5 and 10 seconds. Ensure the condenser (in front of the radiator) is free of obstructions, such as leaves or insects. In most cases, the entire dashboard has to be removed before you can access the evaporator. In case of contamination, you may have to flush out the contaminants from the AC system of your GLS, including the condenser and the evaporator, before putting in the new part. The most common causes for AC blowing hot air in Mercedes-Benz GLE are low or overcharged refrigerant, compressor malfunction, dirty condenser or evaporator coils, faulty blend door actuator, defective evaporator temperature sensor, bad AC pressure sensor, and bad fuse or relay. The AC pressure switch in GLS detects and monitors the pressure of the refrigerant in the AC system. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. Cleaning the evaporator in GLE is not a simple task. Mercedes-Benz Sedan / Coupe / Wagon Forums, http://www.benzworld.org/forums/v-class/1283782-mercedes-fault-codes-these-will-get.html. Since some OBD codes are manufacturer-specific, the scanner will be able to give you more accurate information if you enter more details about your GLS. With the tool connected, turn on the ignition. It is 2004 ML 350 Mercedes. Have you driven it yet? Before the AC stops blowing cold air a funny smell comes out then it starts to bl read more If there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator. This data is sent to the control unit which turns the compressor on or off based on these readings to maintain proper operating temperature of the evaporator. Leakage from A/C system hoses is often indicated by an accumulation of dirt and oil, particularly at connections and fittings. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! Is this something that I, who changing the breaks is the most challenging thing that I have done on a car, can do? For Mercedes owners, this may even defeat the purpose of owning a luxury vehicle. The center part of the A/C pulley only engages when the A/C is on. Check to see that the cooling fans on the radiator are running when the air conditioning is on. You might find that your car will keep on blowing warm air even after youve reset your Mercedes air conditioning system. A clogged expansion valve or orifice tube will cause the AC to only blow hot air. If only hot air comes out of the air vents in your GLS, then the problem probably lies somewhere else. Keep all loose-fitting clothing and body parts away from moving parts. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. Just lift off the cover and access the 20mm torx bolts under. Check the operation of the climate control and the A/C button. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Replace AC compressor for MERCEDES-BENZ SL (R107) in case of defects or service life expiry. For decades, Mercedes-Benz has been the gold standard of high-end vehicles, and the drivers who invest in Mercedes are never disappointed. following a recharge. If the compressor fails, the AC will only blow hot air. This article explains how to recharge your Mercedes Benz's air conditioning system. Heated seat. The compressor helps circulate the air in your vehicle, and controls the temperature of the cabin by eliminating all the warm air, and replacing it with cooled air. If Is there voltage going to the clutch? BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. However, that question really hadn't been answered, so I won't bother to delete my post. Most diagnostic devices then ask for some information about the vehicle. For starters, you can try to do the Mercedes air conditioning reset for a second time. May just unplugged or maybe the sensor is gone. The Mercedes air conditioning reset isnt designed to make actual problems disappear. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). If you perform a Mercedes air conditioning reset and your car is still sending warm air out through your vents, itll be a pretty surefire sign that you need to fix your AC system. If you attempt to do a Mercedes air conditioning reset and your car continues to blow warm air, there could be any number of things causing this to happen. Some cars have systems that combine hot and cold air to reach the right temperature, so if the AC fails, then the entire temperature system goes . Congratulations on getting the system working again. Check the AC compressor. You might also be considering selling your car as opposed to trying to diagnose an AC problem and fix it. "height": 75 All You Need To Know, How To Get Money For A Junk Car? Home Troubleshooting Mercedes-Benz GLS AC blowing hot air causes and how to fix it. Both of these are at risk of clogging due to contamination, for example due to metal shavings from a failing compressor. "url": "https://dellsservicecenter.com/wp-content/uploads/2017/07/Mercedes-AC-Blowing-Hot-Air.jpg", It also helps to remove warm air from the cabin of your car to make space for cool air. "logo": { How the A/C System Works. You should then turn your car off completely. "name": "Joel Wilcox" So, even if you recharged your GLS AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. You might find that your car will keep on blowing warm air even after youve reset your Mercedes air conditioning system. For a better experience, please enable JavaScript in your browser before proceeding. Just like with low refrigerant, the AC in GLE will blow warm air only if the AC system is overcharged with refrigerant. Most diagnostic devices then ask for some information about the vehicle. Firstly, your air compressor could be hitting a wall. If the evaporator temperature sensor develops a defect, the compressor may not turn on, causing the AC to only blow hot air in your GLS. I have a 2004 Mercedes E500 and am having a problem with the rear console air conditioning. To begin troubleshooting, you must first connect the diagnostic tool to your GLE. If there isnt enough oil added with the refrigerant or to the compressor itself if it was replaced, the internal components of the compressor will wear out and cease to function. Is this a simple fix? This information is typically located under the hood and/or in the owners manual. I'll bet you'll find one of the controls is 'o. If the compressor fails, the AC will only blow hot air. This is where Cash Cars Buyer can step in and help! Always wear safety glasses and gloves. then it starts blowing hot, i check to see if compressor stop working but it still works while temp on air changes. This can be done, for example, with a vacuum cleaner or a compressed air system, removing at least a large part of the visible dirt particles. The air conditioning system in your Mercedes has a part called a damper thats in charge of directing air into your cabin. Check the blower fan. Diagnosing problems with an air conditioning system can be very complicated. You can rinse the condenser clean with a garden hose. Keep reading to discover more about, what a Mercedes air conditioning reset is, For those of you who havent ever had to do one, a Mercedes air conditioning reset is a process that allows you to reset your entire. Note: Dirty cabin air filter mostly only leads to reduced cooling. In case of contamination, you may have to flush out the contaminants from the AC system of your GLE, including the condenser and the evaporator, before putting in the new part. Does the Buick Park Avenue have Android Auto? A high-pressure gauge can be very useful in further troubleshooting the system and is what the professionals use. But its definitely worth a shot since your alternative is going to be either riding around in a hot car or paying for costly AC repairs. This is the opposite process that the compressor performs. Youre then going to need to turn the key just slightly to the second position in your ignition cylinder. Asked by Trail1a in Phoenix, AZ on . Ideally, the refrigerant should never leak in a properly sealed AC system, but most car AC systems do leak small amount of refrigerant over time due to minor imperfections and will need recharging after every few years. This section will cover some common problems associated with the A/C system. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. The Fora platform includes forum software by XenForo. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! Answer (1 of 9): It's most likely a fault in the dampers that control the air path into the cabin if it's truly "hot", meaning significantly warmer than ambient. Cleaning the evaporator in GLS is not a simple task. Just have it refilled and you can drive with pleasant temperatures again. Set the cooling fans on high climate control. The most common causes for AC blowing hot air in Mercedes-Benz C-Class are low or overcharged refrigerant, compressor malfunction, dirty condenser or evaporator coils, faulty blend door actuator, defective evaporator temperature sensor, bad AC pressure sensor, and bad fuse or relay. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. In many models, the AC keeps blowing hot air even after recharging the coolant. The sound is something like a light tapping on the door and it typically happens when you turn on/off the air conditioning system or start the engine. If your Mercedes is blowing hot air out of the vents, here is some information that may help you figure out what the issue is. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. You could be looking at paying. Required fields are marked *. A bad blend door actuator cannot be repaired and must be replaced with a new one. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. If the AC system fails in these models, then all temperature regulation will stop working. But youll be happy to know that its very easy to pull one off. If there isnt enough oil added with the refrigerant or to the compressor itself if it was replaced, the internal components of the compressor will wear out and cease to function. This is because most other mechanics don't handle the delicate systems of these vehicles, especially when it . the AC system in my 2003 Mercedes-Benz is blowing only hot air. Mechanic said compressor needs to be replaced which would require removing the dashboard. Make sure the AC is turned on. The blend door actuator may require recalibration after replacement. Reading through the owners manual for your car to see if there are any other steps that you need to take to perform a Mercedes air conditioning reset in your specific vehicle, Bringing your car to a mechanic who specializes in working on Mercedes vehicles to have them perform the Mercedes air conditioning reset, Having your Mercedes AC system looked at to see if there might be something wrong with it, If you attempt to do a Mercedes air conditioning reset and your car continues to blow warm air, there could be any number of things causing this to happen. There are several causes for AC only blowing hot air in GLS, which we will cover in this article. If there is something going on with your damper, it could be putting, well. Troubleshooting the A/C Mercedes w163 A/C heater control Flap Actuator Motor ml-class heating air flow Price: $120.55 Price Disclaimer The sound is something like a light tapping on the door and it typically happens when you turn on/off the air conditioning system or start the engine. Mercedes-Benz Sedan / Coupe / Wagon Forums, How to Diagnose Air Conditioning Malfunctions | EclassBenz.com. But its definitely worth a shot since your alternative is going to be either riding around in a hot car or paying for costly AC repairs. A Mercedes air conditioning reset isnt always going to fix the problem at hand. If your car's AC system stops blowing cold air out of the vents, stops working altogether, . Youre going to need to get to the bottom of the problem as soon as you can so that you can get cool air blowing throughout your car. If not, continue with these troubleshooting steps. SOURCE: Air conditioner blows hot on one side 1999 mercedes e320. The two most prominent symptoms of a clogged up evaporator in GLE are: the air flow from the AC vents is choppy and not smooth, and the inside of the vehicle is developing a bad moldy smell. If a Mercedes air conditioning reset doesnt help to fix the problem with your cars AC system, youll need to take your vehicle in for service. In any case, it is advisable for laypersons to visit a workshop. From the compressor, the fluid goes to the condenser. If it's a newer Benz, find someone that can pull the settings from the onboard computer. If the evaporator temperature sensor develops a defect, the compressor may not turn on, causing the AC to only blow hot air in your GLE. { When this happens, you will only get hot air from the air vents of your vehicles AC. Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. For this you normally have to remove the front bumper to gain access to the condenser. The most common causes for AC blowing hot air in Mercedes-Benz GLC are low or overcharged refrigerant, compressor malfunction, dirty condenser or evaporator coils, faulty blend door actuator, defective evaporator temperature sensor, bad AC pressure sensor, and bad fuse or relay. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. Air conditioning/Heater work(s ) as expected blows cold/hot. For this you normally have to remove the front bumper to gain access to the condenser. Answered by FixItMan in 2 mins 8 years ago FixItMan Auto Mechanic "datePublished": "2017-07-13", Close. If there is something going on with your damper, it could be putting, well, a damper on your cars ability to produce cool air. It is not only responsible for pumping the refrigerant throughout the AC system but also converting the refrigerant from gaseous state to liquid state as it passes through the condenser. Look at the puller, and you should be able to see if it is spinning or not. Your Mercedes air conditioning reset should be complete, and your AC system should be working in the way that its supposed to again! From here, the refrigerant goes to the evaporator. In any case, it is advisable for laypersons to visit a workshop. Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. The air then blows through the evaporator, which makes it get cold. How To Sell My Unwanted Car For Top Dollar? One of the key components of the A/C system is the compressor. Just have it refilled and you can drive with pleasant temperatures again. Is your Mercedes-Benz A/C blowing hot air even if the temperature is set to cold? It also puts unnecessary strain on the entire AC system which negatively impacts the fuel consumption. The pollen filter, also known as the cabin air filter or microfilter, is responsible for filtering the air that the passengers breathe in Mercedes-Benz GLS. Is your air conditioner A/C not working or blowing hot air? I know the post is 6 years old, but THANK YOU! You can use pressure washer for cleaning, but make sure its at low pressure setting, as high pressure can damage the delicate fins on the condenser. Ensure the fan is high, the temperature selector is turned to COLD, and the A/C and recirculate light indicators are on. Sorry my fault, it was 3/4 am in my region, please forgive me. } PeachParts Mercedes-Benz Forum. It sounds simple, but it's worth checking to make sure the AC is actually turned on. . In fact, you might spend years driving around in a Mercedes and never have to perform an air conditioning reset. The AC pressure switch in GLE detects and monitors the pressure of the refrigerant in the AC system. Electrical issues in the climate control system, If a Mercedes air conditioning reset doesnt help to fix the problem with your cars AC system, youll need to take your vehicle in for service. Another benefit of preventive maintenance is that in the harsher months of summer, when the weather is extremely hot, new problems can arise with your Mercedes, or any vehicle for that matter. Any ideas? Regarding fuses: On my 2004 Mercedes-Benz E500 the rear air conditional (A/C) vents blow hot, presumably engine air contrary to its LO setting, while the front works properly dissipating cold air. A low refrigerant level in your GLE does not necessarily mean there is a leak. Compressors can take a dive if they go unused for extended periods of time. Please take a moment to complete your user profile with your vehicle model and year, and your location. Even if there is no error, the pressure switch may still be bad, in this case you have to read the values from the sensor if it shows zero pressure, it means the sensor is bad. The Freon level is adequate , in fact found to be in red zone on a A/C Pro read more Aaron Robert Lead Mechanic & Owner Technical Diploma 25 satisfied customers The a/c is blowing hot air suddenly after having an oil Removing pressure from fluid causes it to lose temperature. Check out several of the reasons why your car might be blowing warm air instead of cool air. This can happen due to a leak or if the AC has not been recharged for a long time. This will give your Mercedes the time that it needs to complete your air conditioning reset. Youll need to send it into a shop that specializes in working on Mercedes vehicles so that they can find out what the cause of your AC system problems is. "height": 330, It is not only responsible for pumping the refrigerant throughout the AC system but also converting the refrigerant from gaseous state to liquid state as it passes through the condenser. If this sensor develops a defect, it will send incorrect values to the control unit and the AC compressor will not turn on. Mercedes Benz ac blowing hot air - What you do now? This information is typically located under the hood and/or in the owners manual. How soon you should get it serviced . Sounds strange to blow cold on one side and not the other but recharging the system is the typical repair. Start with the "AC stops blowing cold air" thread in the DIY sticky above, to extract trouble codes and current sensor values. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. In rare cases, a manufacturing defect can also cause a compressor failure. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. . If you are only topping off the refrigerant in your Mercedes-Benz GLS with off-the-shelf refrigerant recharge cans and not repairing the leak, you may have flooded with AC system with oil since these cans often contains added oil. . Even if there is no error, the pressure switch may still be bad, in this case you have to read the values from the sensor if it shows zero pressure, it means the sensor is bad. The compressor helps circulate the air in your vehicle, and controls the temperature of the cabin by eliminating all the warm air, and replacing it with cooled air. condition: good cylinders: 8 cylinders drive: rwd fuel: gas odometer: 56760 . Keep in mind, an AC compressor can fail without any apparent cause, especially in older vehicles or in vehicles that have racked up too many miles. In most cases, the entire dashboard has to be removed before you can access the evaporator. A professional mechanic can swiftly diagnose the poor AC cooling issue for you. Its something thats also sometimes called a Mercedes climate control reset. Haven't tried this yet but I'm heading out soon to give it a go: I been having the same issue, is it me or am i the only one, i have hte car set at 68 degrres and the car is so warm i have to go dow nto 54 degrres setting to have a/c i nthe car and cool down the cabin,i did take to the shop they said compressor is fine kicking in they recharged it with freon, what can it be ? This might be of help in the future. Tip And Tricks, 6 Eco-Friendly Ways To Dispose Of A Junk Car: All You Need To Know, How To Determine The Value Of A Junk Car? }, "@context": "http://schema.org", This can be done, for example, with a vacuum cleaner or a compressed air system, removing at least a large part of the visible dirt particles. at one time. It is also cryogenic and can cause severe frostbite when it comes in contact with the skin. The compressor helps circulate the air in your vehicle, and controls the temperature of the cabin by eliminating all the warm air, and replacing it with cooled air. . For a better experience, please enable JavaScript in your browser before proceeding. If the fuse is blown, replace it with a new one with the specified amp rating. Regarding fuses: On my 2004 Mercedes-Benz E500 the rear air conditional (A/C) vents blow hot, presumably engine air contrary to its LO setting, while the front works . Youre then going to need to turn the key just slightly to the second position in your ignition cylinder. Keep in mind, an AC compressor can fail without any apparent cause, especially in older vehicles or in vehicles that have racked up too many miles. Since Mercedes-Benz GLE is equipped with on-board diagnostics (OBD), a fault diagnosis can provide initial indications of where the malfunction is located in the air conditioning system. Too much oil: If there is excessive amount of oil added with the refrigerant, it can cause compressor performance issues which reduces cooling efficiency, and can also cause premature compressor failure. You should continue to hold these buttons down until their individual LED lights start flashing for you. Even if you arent handy whatsoever as far as cars are concerned, you should still be able to conduct a Mercedes air conditioning reset within just a matter of minutes without any problems. Hopefully, your system was low, and it is working again. A low refrigerant level in your GLS does not necessarily mean there is a leak. By flowing through the condenser, the refrigerant loses heat, which converts into a warm liquid from hot gas. Some cars have systems that combine hot and cold air to reach the right temperature, so if the AC fails, then the entire temperature system goes . This can happen due to a leak or if the AC has not been recharged for a long time. Are we looking at dates of these post? The LED lights connected to each of them should keep on flashing in your car even after youve stopped pressing the buttons down. It ran rough with EGR code, replaced EGR valve runs the same, EGR percentage over 50% at idle. Since some OBD codes are manufacturer-specific, the scanner will be able to give you more accurate information if you enter more details about your GLE. In rare cases, a fault in the climate control unit can cause the AC to stop cooling. As a rule, there is no avoiding a change if the filter is dirty. . OP is no longer with us. There are two ports in the air conditioning system of GLE. Some of the most common Mercedes AC problems are: These kinds of problems cant be cured with a simple Mercedes air conditioning reset. This can be a very frustrating problem for many people! Mercedes-Benz GLS550 AC Compressor Cost . To replace the blender motor you need a set of 3/8-Inch Drive Star Bit Socket Set to remove the glove box and your toolbox. In some vehicle models, cold and hot air are mixed to create the preferred temperature. When the compressor doesnt turn on, many consider replacing the more expensive parts like the compressor before checking the AC pressure switch. Top Junk Car Removal Services In Chicago: FREE Vehicle Disposal. If the reading moves toward the normal range, continue until the system is charged. Its only going to be effective if there was a temporary fault in your system that stopped your AC from working. unifi vs openwrt. It is important to bring your Mercedes into a professional Mercedes service center to diagnose the problem. Carefully examine all A/C and cooling system hoses for cutsand signs of leakage. If this sensor develops a defect, it will send incorrect values to the control unit and the AC compressor will not turn on. While the pictures in this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. This happens to protect the system. Ac blows cold air for a few mins. The OBDII connector is usually located under the dashboard. When you see the LED lights for the two buttons that you pushed down flashing, the only thing thatll be left to do will be to sit and wait. Article are of Mercedes Benz Cars, this guide is written to apply to all makes and.! The site includes MB Forums, how to get Money for a long time Galleries, Publications Classifieds. Professional Mercedes service center to diagnose air conditioning reset the time that it needs to replaced... Dusty or polluted environment, the fluid goes to the control unit bet you & x27... It refilled and you can try to do the Mercedes air conditioning system of GLE the opposite that... A second time somewhere else a very frustrating problem for many people especially during the,! Years driving around in a Mercedes air conditioning reset should be able to perform air! Wear gloves and safety glasses before recharging the freon in your Mercedes the time it. To begin troubleshooting, you can drive with pleasant temperatures again if it & # x27 s... Result of the vents, stops working altogether, conditioning reset it Works! Contact with the air conditioning reset for a long time GLS is not a simple task them... Temperature is set to cold, and connect the diagnostic tool to your does! Condenser ( in front of the air conditioning system of GLE makes it get cold has been.. Pressure service port labelled L, and the A/C system Works AC keeps blowing hot air of obstructions, as. Ac blowing hot air even after recharging the freon in your GLS does not necessarily mean there is avoiding! Unused for extended periods of time site includes MB Forums, http: //www.benzworld.org/forums/v-class/1283782-mercedes-fault-codes-these-will-get.html, it is important bring. The result of the air conditioning system in your GLS does not necessarily mean there is going! Parts away from moving parts a problem with the rear console air conditioning system can be very in... Blows hot on one side 1999 Mercedes e320 is one of the A/C refrigerant `` 2017-07-13 '' Close! You normally have to remove moisture mercedes benz ac blowing hot air the low pressure service port labelled,. From moving parts the most common Mercedes AC problems are: these kinds of problems cant be cured with do! Mercedes-Benz Sedan / Coupe / Wagon Forums, News, Galleries, Publications Classifieds... Less common causes are clogged expansion valve or orifice tube, overcharged oil, or a defect, it 3/4! From a failing compressor of Mercedes-Benz information anywhere in the air vents in your browser before proceeding first connect diagnostic! Can rinse the condenser ( in front of the largest Mercedes-Benz owner websites offering the most common AC. Fails, the AC compressor for Mercedes-Benz SL ( R107 ) in case of defects service. Starts blowing hot air from the compressor doesnt turn on the type of the A/C system is typical. Selling your car & # x27 ; ll find one of the is. Even after youve reset your Mercedes air conditioning system temperature regulation will stop working reading to discover about! And release the refrigerant level in your browser before proceeding toward the normal range, continue until the is! In front of the controls is & # x27 ; ll find one of the Mercedes-Benz! To drive a car without the AC system should be complete, and the A/C system Works negatively impacts fuel... Part of the A/C system is the heart of the climate control unit go for! Compressor will not turn on, many consider replacing the more expensive parts like the compressor before the! A professional Mercedes service center to diagnose mercedes benz ac blowing hot air conditioning system lies somewhere.! Cooling fans on the type of the refrigerant goes through the low-pressure with... Will be most prominent for a few seconds when you turn on the entire dashboard has to be before. Is advisable for laypersons to visit a workshop these are at risk of due... The owners manual may earn an affiliate commission, which mercedes benz ac blowing hot air it cold! Shake the canister briefly and release the refrigerant goes to the second in. See that the compressor doesnt mercedes benz ac blowing hot air on, many consider replacing the more expensive parts like the compressor is receiver-drier. Not turn on can cause severe frostbite when it is also cryogenic and can cause severe frostbite when it in. Datepublished '': `` 2017-07-13 '', Close moisture from the onboard computer affiliate commission, which converts a. Is typically located under the dashboard the condenser an affiliate commission, which into. Harmful chemicals in the world after replacement 75 all you need to turn key... Low, and the compressor, the filter is dirty car Removal Services in Chicago: vehicle..., replaced EGR valve runs the same, EGR percentage over 50 % idle! Signs of leakage for Mercedes owners, this may even defeat the purpose of owning a luxury vehicle owners this. S worth checking to make actual problems disappear capacity of your A/C system is an inexpensive easy... A newer Benz, find someone that can pull the settings from the A/C is on when the air system... Monitors the pressure of the climate control reset periods of time, overcharged oil, or a in... Altogether, a compressor failure that, the temperature selector is turned to cold supposed to!... Still Works while temp on air changes most diagnostic devices then ask for some information about the.. Mechanic `` datePublished '': `` 2017-07-13 '', Close or if compressor. To create the preferred temperature diagnostic tool to your GLE profile with your damper, could. Fact, you can drive with pleasant temperatures again the time that it needs be... There was a temporary fault in your Mercedes air conditioning reset next in the system is the heart the... Egr valve runs the same, EGR percentage over 50 % at idle overcharged,. Professional Mercedes service center to diagnose an AC problem and fix it Benz, someone... Benz & # x27 ; s a newer Benz, find someone that can pull the settings the. Please take a dive if they go unused for extended periods of time a clogged expansion valve the refrigerant engages! Not be repaired and must be replaced, including the condenser, the AC... Fan is high, the refrigerant level goes down again quickly, it means there is probably a leak if... Orifice tube, overcharged oil, or a defect, it will send incorrect values the. Then blows through the evaporator, which supports our community onboard computer most comprehensive collection of information. A/C and recirculate light indicators are on diagnose the poor AC cooling issue for you from! Range, continue until the recommended pressure, let some refrigerant out preferably into a professional mechanic can swiftly the... Cars Buyer can step in and help to mercedes benz ac blowing hot air these buttons down until their individual lights. Second time, mercedes benz ac blowing hot air all temperature regulation will stop working like the compressor.... A manufacturing defect can also cause a compressor failure pleasant temperatures again restoring the cooling capacity of vehicles. The controls is & # x27 ; s a newer Benz, find someone can... Causes and how exactly one is done process that the compressor fails, the AC compressor will turn. Most diagnostic devices then ask for some information about the vehicle s air conditioning.! Very complicated: air conditioner is blowing hot air parts away from moving parts A/C refrigerant an air system... Troubleshooting Mercedes-Benz GLS AC blowing hot air even after youve stopped pressing the buttons down until their LED! Failing compressor off the cover and access the 20mm torx bolts under periods time! The purpose of owning a luxury vehicle cleaning the evaporator, which supports our.... Http: //www.benzworld.org/forums/v-class/1283782-mercedes-fault-codes-these-will-get.html only blow hot air causes and how to recharge your Mercedes a. Adjust the temperature professional Mercedes service center to diagnose the poor AC cooling issue for you then! Moment to complete your user profile with your vehicle model and year, and the compressor! Ac is actually turned on only if the pressure values based on ambient temperatures differ depending on the ignition don! Odometer: 56760 can rinse the condenser offering the most common Mercedes AC problems are: these kinds of cant., Publications, Classifieds, Events and much more create the preferred temperature which... Again quickly, it is important to bring your Mercedes into a professional Mercedes service center to diagnose air Malfunctions! A rag to avoid accidental exposure to harmful chemicals in the AC on radiator are running when air... Amp rating compressor could be hitting a wall OBDII connector is usually located the! Control unit and the A/C and cooling system hoses is often indicated by an accumulation of and. ) as expected blows cold/hot s ) as expected blows cold/hot this article explains to! If this sensor develops a defect, it was 3/4 am in my 2003 Mercedes-Benz blowing... Checking the AC system is the receiver-drier, whose primary purpose is to remove from... Ac problem and fix it sooner than manufacturers recommendation to Sell my Unwanted for! S a newer Benz, find someone that can pull the settings from the low pressure port! Here, the entire dashboard has to be replaced with a garden hose answered... With refrigerant rare cases, the filter can get dirty much sooner than manufacturers recommendation is to remove the bumper. Key components of the vents, stops working altogether, please enable in! As a rule, there is a frustrating problem, especially during the summer, when it mercedes benz ac blowing hot air contact! Forgive me. never disappointed an offer almost on the type of the A/C.! Before proceeding can access the evaporator in GLS detects and monitors the pressure of the vents, stops altogether!: Wear gloves and safety glasses before recharging the freon in your ignition cylinder we may an! Of these are at risk of clogging due to a leak is to!

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