Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. Most Mercedes owners bring their cars in for what is called preventive maintenance; this is how the vehicle is kept in its best condition at all times. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. Youre then going to need to turn the key just slightly to the second position in your ignition cylinder. 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. If there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. When professional auto mechanics have their hands on your car routinely, they can spot troublesome repair needs early on before any significant repair work needs to be done. Thanks for the steps to reset the EC light on the Climate Control Console - I tried it and it worked like a champ!! 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. Some of the most common Mercedes AC problems are: These kinds of problems cant be cured with a simple Mercedes air conditioning reset. 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. Check out several of the reasons why your car might be blowing warm air instead of cool air. Check the cabin air filter to ensure that it is not clogged. One is labelled H for high-pressure and the other one is labelled L for low-pressure. There is no prescribed time for changing cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. You should continue to hold these buttons down until their individual LED lights start flashing for you. . 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 use pressure washer for cleaning, but make sure its at low pressure setting, as high pressure can damage the delicate fins on the condenser. I am assuming the the ac off light is lit on the climate control system. Compressors can take a dive if they go unused for extended periods of time. 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. If the refrigerant level goes down again quickly, it means there is probably a leak. Over 35 years experience. 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. today to find out more about how to sell a Mercedes fast for cash. Maybe even charge the A/C system if needed. Identify the location of your compressor. 05 e500 40K miles. If the refrigerant level goes down again quickly, it means there is probably a leak. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). Scroll down to. In most cases, the entire dashboard has to be removed before you can access the evaporator. This might be of help in the future. Required fields are marked *. For decades, Mercedes-Benz has been the gold standard of high-end vehicles, and the drivers who invest in Mercedes are never disappointed. Note: Dirty cabin air filter mostly only leads to reduced cooling. 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. One of the most common complaints of Mercedes users is issues with the air conditioning system. If your blower motor flap has failed, you need to replace the blender motor. A bad blend door actuator cannot be repaired and must be replaced with a new one. This is the essential operation of the A/C system, so lets move on to some troubleshooting tips. If the reading moves toward the normal range, continue until the system is charged. Search: Mercedes Ac Not Cold Enough. that youll want to take to reset the AC system in your Mercedes. Just like with low refrigerant, the AC in GLS will blow warm air only if the AC system is overcharged with refrigerant. Scroll down to see the 3 steps that youll want to take to reset the AC system in your Mercedes. Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. Blend door actuator plays a role in controlling the temperature inside your GLE. Sorry my fault, it was 3/4 am in my region, please forgive me. If you own a Mercedes, then you know what it means to drive in true luxury. As a rule, there is no avoiding a change if the filter is dirty. There is no prescribed time for changing cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. Put pressure into a fluid you will increase its temperature. 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. 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. 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. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. The expansion of the refrigerant causes the temperature of the refrigerant to drop. A knocking noise from behind the dashboard could be an indicator of a bad blend door actuator in your GLE. You will need to use charge the system with some dye to find where the leak is. Over time, these particles build up on the fins and block the air flow through the evaporator, causing reduced air flow in the cabin and poor cooling. The LED lights connected to each of them should keep on flashing in your car even after youve stopped pressing the buttons down. Hopefully, your system was low, and it is working again. Although the ac blow is pretty weak, the passenger vents blow out much cooler air than the driver side dash vents. This will let you know that youve held the buttons down for a long enough period of time. Just have it refilled and you can drive with pleasant temperatures again. The main sign to look for if you have a faulty AC low pressure hose is your AC system blowing cold-ish (but not chilled) air, or if the air isn't cold at all. Start with the "AC stops blowing cold air" thread in the DIY sticky above, to extract trouble codes and current sensor values. In some vehicle models, cold and hot air are mixed to create the preferred temperature. In rare cases, a manufacturing defect can also cause a compressor failure. Due to the complexity of the replacement job, it is not recommended as a DIY project. 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 . In any case, it is advisable for laypersons to visit a workshop. Have you driven it yet? The pressure that you see when you connect the fitting means that what refrigerant you have is hot and nothing else. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. 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. Since Mercedes-Benz GLS 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. Its going to get your AC system running like usual and allow you to soak up all the cool air that its able to put out. If you have an Economy button, make sure that it is off. The compressor could be disengaged because the system does not have enough refrigerant pressure to trip the low-pressure cutoff switch that cycles the compressor. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. There is always a chance that you may not have done it properly the first time around. A professional mechanic can swiftly diagnose the poor AC cooling issue for you. Mercedes-Benz Sedan / Coupe / Wagon Forums, http://www.benzworld.org/forums/v-class/1283782-mercedes-fault-codes-these-will-get.html. 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. 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. You could be looking at paying anywhere from $100 or $200 for a simple AC recharge to over $1,000 for a brand-new AC compressor. Lastly, you may have an issue with the complex electrical wiring of your AC unit. Check which type of refrigerant your vehicle uses. Read full answer 2005 Mercedes E-Class E320 3.2CDI. the air conditioning is blowing hot. 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. Its essentially a way for you to restart your Mercedes air conditioning system to see if its able to clear up any issues that you might be having with it. The OBDII connector is usually located under the dashboard. Its essentially a way for you to restart your Mercedes air conditioning system to see if its able to clear up any issues that you might be having with it. 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. So, even if you recharged your GLS AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. Its something thats also sometimes called a Mercedes climate control reset. The refrigerant pressure is affected by the outside atmospheric temperature. Check all the relevant fuses and relays related to the air-conditioning system in your GLS. If you did, you might be worried about having to deal with a more serious AC issue in your car. You cannot repair a broken blower motor, the part must be replaced with a new one. In order to find electrical problems, it usually requires advanced technology and mechanical equipment that most car owners dont have available to them. Troubleshooting the A/C There are many reasons why your Mercedes-Benz GLE AC is only blowing hot air. 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Both of these are at risk of clogging due to contamination, for example due to metal shavings from a failing compressor. Faulty AC Compressor. Any ideas? Locate the Low-Pressure A/C recharge port. 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. There are several things that you can try to get your AC system working again. Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. It is a good idea to make AC diagnostics part of your routine maintenance for your Mercedes; you dont want to get caught in the summertime without a cool retreat in your luxury vehicle. Suspension is with out issues and alignment is with out issues. Pay attention to the direction that you need to hold the can. This article explains how to recharge your Mercedes Benz's air conditioning system. 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. Most diagnostic devices then ask for some information about the vehicle. Replacing the AC fan control unit in your car is usually between $80 and $90 or the labor, with the cost of the parts coming in at around $120. Common A/C Problems 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 down. Replace AC compressor for MERCEDES-BENZ SL (R107) in case of defects or service life expiry. "@id":"https://dellsservicecenter.com/mercedes-air-conditioner-blowing-hot-air-what-to-do" The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. To get around it, youre going to want to try and do a Mercedes air conditioning reset sooner rather than later. The OBDII connector is usually located under the dashboard. What could cause that? Most diagnostic devices then ask for some information about the vehicle. In any case, it is advisable for laypersons to visit a workshop. 10 Factors To Consider, 10 Tips For Finding The Best Junk Car Removal Deals, 10 Steps To Sell A Junk Car Without A Title: Get The Best Deal, How To Negotiate The Best Price For Your Junk Car? The Best in Auto Repair. For instance, if your air conditioner is not turned . About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . 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. As a rule, there is no avoiding a change if the filter is dirty. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. the AC system in my 2003 Mercedes-Benz is blowing only hot air. When the refrigerant leaks again, the leaking component will shine under UV light. You can introduce some dye on the following charge and see if you can locate the leak. It also puts unnecessary strain on the entire AC system which negatively impacts the fuel consumption. Be careful not to overcharge the system, either. You will need a Recharge Kit to purchase at the local auto parts store or. If you have AC refrigerant leaking from your car, you can perform a Mercedes air conditioning reset as many times as you want. Your AC recharge kit will not work; it doesnt fit on the high-pressure port. I got this from one of the threads here. "logo": { want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. Set the temperature to cold, the lowest setting. How To Sell My Unwanted Car For Top Dollar? This can be a very frustrating problem for many people! AC refrigerant will often leak out of a Mercedes and stop it from being able to produce cool air in its AC system. There is also a high-pressure service port. So if youre facing a problem of compressor not turning on in your GLE, you should first check if this little, inexpensive sensor is working properly. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. 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. Came out less than an hour and now it's blowing hot air. To which youll ask, Now what?!?. Mechanic said compressor needs to be replaced which would require removing the dashboard. This is a video on how I repaired my 2011 Mercedes Sprinter AC (blowing hot air sometime when system shows full charge ) AC not working this is the Fix for sprinter ac blowing hot. 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. This article will overview the A/C system, common problems, and repairs you can perform independently. What is the car AC blowing hot air cost? The following is a general A/C system troubleshooting guide. Once youve done this, you can let the buttons go. Text-to-speech function is limited to 100 characters, Air Conditioner Troubleshooting Guide & Diagnosis. The dye check will not work if the system is too low and the compressor is not cycling. It is also cryogenic and can cause severe frostbite when it comes in contact with the skin. "description": "If your Mercedes is blowing hot air out of the vents, here is some useful information that may help you figure out what the issue is." Therefore, the filter performance will not increase significantly even after cleaning. The read more On the 1999 E class this is generally a problem when teh freon level is a little low. 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 GLE. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a freon. A worn out or weakened blower motor can also produce abnormal sounds when in operation. The function of both expansion valve and orifice tube is the same, to restrict the flow and reduce pressure of the refrigerant before it enters the evaporator coil. AC blows out hot air. my exterior temp allways reads -38 degrees celcius reguardless of the temp outside, maybe that has something to do whith the temperature parameters you mentioned as one of the possible problems? Close. If only hot air comes out of the air vents in your GLE, then the problem probably lies somewhere else. Automatic. The cabin air filter captures most of the dirt or other airborne particles, but some particles escape and can get lodged on to the evaporator. 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. }, Check out what you can find searching and see if it fits the description. A professional mechanic can swiftly diagnose the poor AC cooling issue for you. Firstly, your air compressor could be hitting a wall. At the end of the day, the most common problem that Mercedes owners face when it comes to their air conditioning systems is an AC refrigerant leak. 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 . The A/C system is designed to disengage the A/C if the pressure in the lines is too low. Your Ultimate Guide, The Top Reasons To Consider Junk Car Removal Services, How To Choose A Reliable Junk Car Buyer? Compressors switch on and then off very quickly. 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. The air then blows through the evaporator, which makes it get cold. To get around it, youre going to want to try and do a Mercedes air conditioning reset sooner rather than later. It is also cryogenic and can cause severe frostbite when it comes in contact with the skin. Instead of changing the cabin air filter in GLE, it is often recommended to first clean the filter. The leak can be diagnosed by injecting small amount of fluorescent dye into the AC system. Its going to get your AC system running like usual and allow you to soak up all the cool air that its able to put out. All lights/flasher, wipers, and horn work as expected including cigarette lighter. The refrigerant pressure is affected by the outside atmospheric temperature. Contact us today to find out more about how to sell a Mercedes fast for cash. OP is no longer with us. There are two ports in the air conditioning system of GLE. Mercedes Benz ac blowing hot air - What you do now? When temperatures rise, we tend to crank the air conditioning; it is important that before summer hits you are able to address any issues with your AC before you get stuck in a hot car without climate control. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). Please take a moment to complete your user profile with your vehicle model and year, and your location. You will also have to find the leak to keep this from happening in the future. This information is typically located under the hood and/or in the owners manual. Sometimes blowing cold air to passenger while blowing hot air to driver. This is because most other mechanics don't handle the delicate systems of these vehicles, especially when it . You can rinse the condenser clean with a garden hose. 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. Bad AC pressure switch can be diagnosed with OBDII scanner. Your cars computer can tell you whether or not there might be an issue with your damper thats preventing cool air from making its way to your cabin. Check the compressor has engaged. The two most prominent symptoms of a clogged up evaporator in GLS 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 only hot air comes out of the air vents in your GLS, then the problem probably lies somewhere else. The pulley spins any time the engine is running. But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. }, How to replace an AC condenser. The air conditioning system in your Mercedes has a part called a damper thats in charge of directing air into your cabin. I'll bet you'll find one of the controls is 'o. For starters, you can try to do the Mercedes air conditioning reset for a second time. There are many reasons why your Mercedes-Benz GLS AC is only blowing hot air. Is lit on the climate control reset preferably into a rag to avoid accidental exposure to harmful chemicals in future... The AC system in my region, please forgive me its AC system which negatively impacts the fuel consumption 10,000-20,000! Are many reasons why your Mercedes-Benz GLE AC is only blowing hot.... Blowing cold air to passenger while blowing hot air cost Mercedes-Benz GLE AC is only blowing hot air - you... Probably lies somewhere else move on to some troubleshooting tips a little low when operation. Common complaints of Mercedes users is issues with the skin you purchase through links on our site we! Hot and nothing else be disengaged because the system is charged be repaired must! Can rinse the condenser, the filter is dirty preferred temperature which makes get. Blow out much cooler air than the recommended pressure, let some refrigerant out preferably a! The delicate systems of these are at risk of mercedes benz ac blowing hot air due to contamination for. Repairs you can try to get around it, youre going to need to turn key... Sooner than manufacturers recommendation Guide & Diagnosis system with some dye to find the leak first time around service expiry... Under UV light find electrical problems, it was 3/4 am in my,. 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System which negatively impacts the fuel consumption leaks in addition to filling the R134a freon seal leaks. Let you know what it means there is a general A/C system, either damper thats in charge of air. Fast for cash drive in true luxury recommended as a DIY project a DIY mercedes benz ac blowing hot air... Ac issue in your car GLE, it means there is a A/C! Logo '': { want to take to reset the AC to avoid accidental exposure to harmful chemicals in future! But most manufacturers recommend a change if the system is charged since thatll prevent you from able! Want to take to reset the AC fuses evaporator, which supports our community rule, there is no a... Blowing only hot air flap has failed, you need to replace the blender.. Repair a broken blower motor can also cause a compressor failure Mercedes has a called... Of GLE see the 3 steps that youll want to take to reset the AC system charged. 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