"name": "Joel Wilcox" In rare cases, a fault in the climate control unit can cause the AC to stop cooling. How To Sell A Nonrunning Car For Cash? "name": "Dells Service Center", From here, the refrigerant goes to the evaporator. my air conditioner is blowing hot air the red light on a/c button is on and cant shut it off. A bad blend door actuator cannot be repaired and must be replaced with a new one. Working on your Mercedes Benz's aircon system is time-consuming but not . If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. For starters, you can try to do the Mercedes air conditioning reset for a second time. Scan tools shows over 50% contribution at idle, never seen an EGR valve on any manufacturer open at idle, what should it be? A dirty filter causes the overall ventilation of the interior to deteriorate resulting in reduced cooling and air flow. Your AC recharge kit will not work; it doesnt fit on the high-pressure port. Ac blows cold air for a few mins. The Best in Auto Repair. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. "@context": "http://schema.org", You will need to use charge the system with some dye to find where the leak is. 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. Diagnosing problems with an air conditioning system can be very complicated. If the refrigerant level goes down again quickly, it means there is probably a leak. It was blowing cold, wife turned the car off & went into the store . Heated seat. 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. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Air conditioning/Heater work(s ) as expected blows cold/hot. Your email address will not be published. Less common causes are clogged expansion valve or orifice tube, overcharged oil, or a defect in the climate control unit. You will also have to find the leak to keep this from happening in the future. Whether you drive your Mercedes long distances, to work everyday, running errands, picking up kids, they are known for their consistent reliability. "datePublished": "2017-07-13", How soon you should get it serviced . The OBDII connector is usually located under the dashboard. After the one-minute mark has passed, you can start your car up like normal. Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. If you have AC refrigerant leaking from your car, you can perform a Mercedes air conditioning reset as many times as you want. "@type":"WebPage", If you see any error code from P0530 to P0533 after connecting the diagnostic device to your GLE, it indicates a problem with the AC pressure switch. Check the cabin air filter to ensure that it is not clogged. May 23, 2014. 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. Rear-End Collision Repair Cost Fix Your Bumper Before You Get A Hefty Fine! It also puts unnecessary strain on the entire AC system which negatively impacts the fuel consumption. If you can't get cold air in the cabin, the compressor might have failed. Another issue that might be happening when your AC is blowing hot air is a refrigerant or coolant leak. 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. Is this something that I, who changing the breaks is the most challenging thing that I have done on a car, can do? However, that question really hadn't been answered, so I won't bother to delete my post. Just like with low refrigerant, the AC in GLS will blow warm air only if the AC system is overcharged with refrigerant. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. Due to the complexity of the replacement job, it is not recommended as a DIY project. To get around this issue, you can turn on the defroster, which automatically uses the AC component. please help !!! You will need a Recharge Kit to purchase at the local auto parts store or. Keep reading to discover more about what a Mercedes air conditioning reset is and how exactly one is done. Scroll down to see the 3 steps that youll want to take to reset the AC system in your Mercedes. AC not working, blows hot air on Mercedes S 430, S500, S600 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. Bad AC pressure switch can be diagnosed with OBDII scanner. If so, are there any threads out there that help guide me to 1) recharging the ac and 2) fixing this discriminatory ac distribution? But if its getting up there in age, you might be better off getting rid of it rather than spending a small fortune on AC repairs. Check the AC compressor. In some vehicle models, cold and hot air are mixed to create the preferred temperature. A Mercedes air conditioning reset isnt something that youre going to need to do on a regular basis. Thermostat and Valve issues with heater blowing cold air. Turn on the AC and set it to the coldest setting, and the fan speed to maximum. If its broken, its going to result in only warm air on the interior of your car. Just lift off the cover and access the 20mm torx bolts under. Is this a simple fix? Text-to-speech function is limited to 100 characters, Air Conditioner Troubleshooting Guide & Diagnosis. By accessing MB Medic [www.mercedesmedic.com], you agree that you have read, understood, and will abide by the: Check for Recalls, Technical Service Bulletins, Common Air Conditioner Problems and Solutions, www.clarks-garage.com/shop-manual/hvac-02.htm, aircondition.com/tech/questions/82/Troubleshooting-with-Gauges-FAQ, www.aa1car.com/library/automatic_climate_control.htm, www.movacs.com/How%20it%20works/index.html, Quick Fix for Mercedes Bouncing Door Lock, Mercedes-Benz Star Diagnostic Scanner Tool Everything you need to know, Mercedes-Benz wont start| Step by Step Troubleshooting Guide, 10 Things All Mercedes-Benz Owners Should Know, How to use a OBDII Bluetooth adapter to reset Check Engine Light on your Mercedes-Benz, Top 10 Best Diagnostic Scanners Mercedes-Benz, Mercedes Transmission Problems, Limp Mode, No Shifting: Troubleshooting Tips, No pressure or low refrigerant levels in the A/C System. Or maybe the outside sensor is correct - you ARE after all in Canada. This will give your Mercedes the time that it needs to complete your air conditioning reset. A Mercedes air conditioning reset isnt always going to fix the problem at hand. Connect the pressure gauge to the low pressure (L) port in GLE. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. An overcharged system not only affects cooling performance but can also damage the compressor and sometimes can cause a major leak. I usually notice, but didn't. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. A dirty filter causes the overall ventilation of the interior to deteriorate resulting in reduced cooling and air flow. . More often than not, a Mercedes air conditioning reset is going to do the trick when your car wont blow anything but warm air following a recharge. Note: Dirty cabin air filter mostly only leads to reduced cooling. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. If you do happen to start your car, youll want to shut it back off and remove your key from your ignition before starting the Mercedes air conditioning reset process over again. "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." Scroll down to. Quick And Easy Junk Car Removal: Cash Cars Buyer. Turn on the AC and set it to the coldest setting, and the fan speed to maximum. The most common symptom of a faulty blend door actuator in Mercedes-Benz GLS is a slight clicking sound (or other unusual noise) repeatedly coming from under the dashboard. It tells you nothing about the refrigerant quantity. Your vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. Thanks to all the posters on this thread. Check all the relevant fuses and relays related to the air-conditioning system in your GLE. Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. "@id":"https://dellsservicecenter.com/mercedes-air-conditioner-blowing-hot-air-what-to-do" As you charge the system, you may notice the A/C starts to work. The blend door actuator may require recalibration after replacement. 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. Just get in touch with us and let us know a little more about your car (make and model, year, mileage, etc.) Blend door actuator plays a role in controlling the temperature inside your GLS. A professional mechanic can swiftly diagnose the poor AC cooling issue for you. How To Sell My Unwanted Car For Top Dollar? 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. Automatic. SOURCE: Air conditioner blows hot on one side 1999 mercedes e320. 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. Home Troubleshooting Mercedes-Benz GLS AC blowing hot air causes and how to fix it. The dye check will not work if the system is too low and the compressor is not cycling. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. While the pictures in this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. I got this from one of the threads here. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. Instead of changing the cabin air filter in GLE, it is often recommended to first clean the filter. To begin troubleshooting, you must first connect the diagnostic tool to your GLE. It is beneficial to be sure you are using your air conditioner on a somewhat regular basis, even during the colder months. Its something thats also sometimes called a Mercedes climate control reset. There is no prescribed time for changing cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. If not, continue with these troubleshooting steps. Mechanic said compressor needs to be replaced which would require removing the dashboard. The low-temperature refrigerant passes through the evaporator, which causes the evaporator to get cold. Driving your Mercedes-Benz GLE 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. Connect the pressure gauge to the low pressure (L) port in GLS. If you did, you might be worried about having to deal with a more serious AC issue in your car. This happens to protect the system. In rare cases, a manufacturing defect can also cause a compressor failure. . If it's a newer Benz, find someone that can pull the settings from the onboard computer. I am assuming the the ac off light is lit on the climate control system. The AC pressure switch in GLE detects and monitors the pressure of the refrigerant in the AC system. condition: good cylinders: 8 cylinders drive: rwd fuel: gas odometer: 56760 . Set the temperature to cold, the lowest setting. 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. 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. The reason for this is that if you have low levels of refrigerant, you cannot simply top off the fluid level; the AC system is a closed system that should not have a depletion of refrigerant at any time. There are two ports in the air conditioning system of GLE. 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. When hot air is blowing I check under the hood and tube from AC compressor is cold all the time. Start with the "AC stops blowing cold air" thread in the DIY sticky above, to extract trouble codes and current sensor values. 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 AC system at one time. 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. If you are charging the system, but the gauge is not moving, you may have a large leak. One is labelled H for high-pressure and the other one is labelled L for low-pressure. 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. "logo": { 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. 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. More often than not, a Mercedes air conditioning reset is going to do the trick when your car won't blow anything but warm air following a recharge. 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. The most common causes for AC blowing hot air in Mercedes-Benz GLS 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. In most cases, the entire dashboard has to be removed before you can access the evaporator. If there is something going on with your damper, it could be putting, well. Mercedes-Benz E250 AC Condenser Cost . 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. Youre then going to need to turn the key just slightly to the second position in your ignition cylinder. If you dont service the AC system in your GLS for a long time, the refrigerant level will eventually get so low that the system loses its cooling capacity. Mercedes w163 A/C heater control Flap Actuator Motor ml-class heating air flow Price: $120.55 Price Disclaimer One of the key components of the A/C system is the compressor. For Mercedes owners, this may even defeat the purpose of owning a luxury vehicle. 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. Dirty evaporator can also cause GLS AC to blow hot air. There is also a high-pressure service port. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. "image": { When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. and well respond with an offer almost on the spot. Its the simplest way to sell an older car in a hurry without having to put in too much effort on your part. Once youve done this, you can let the buttons go. 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. Instead of changing the cabin air filter in GLS, it is often recommended to first clean the filter. The clutch may be bad. Always wear safety glasses and gloves. Mercedes-Benz GLS550 AC Compressor Cost . The expansion of the refrigerant causes the temperature of the refrigerant to drop. After you have your key in the second position in your ignition cylinder, you can then move on to focusing on the buttons that are used for recirculating air and defrosting in your car. When this happens, you will only get hot air from the air vents of your vehicles AC. Congratulations on getting the system working again. Contact us today to find out more about how to sell a Mercedes fast for cash. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. When the refrigerant leaks again, the leaking component will shine under UV light. 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. 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. If the fuse is blown, replace it with a new one with the specified amp rating. 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. . There is always a chance that you may not have done it properly the first time around. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). Set the cooling fans on high climate control. Over time, grime, bugs and other small particles can build up on its surface and in the gaps of its mesh. If the system works but only for a short time, again, you have a leak that you need to locate and repair. 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. Blend door actuator plays a role in controlling the temperature inside your GLE. today to find out more about how to sell a Mercedes fast for cash. It sounds simple, but it's worth checking to make sure the AC is actually turned on. Outside temperature updates only when vehicle is in motion. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! A high-pressure gauge can be very useful in further troubleshooting the system and is what the professionals use. OP's thread is ancient - dates back to August, and the first reply was more than a month later. The compressor is the heart of the air conditioning system in Mercedes-Benz GLS. In any case, it is advisable for laypersons to visit a workshop. , you might notice that your air conditioning system will continue to blow warm air even after youve recharged the refrigerant in your car. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. AC refrigerant will often leak out of a Mercedes and stop it from being able to produce cool air in its AC system. This is because most other mechanics don't handle the delicate systems of these vehicles, especially when it . 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? If there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator. Next in the system is the receiver-drier, whose primary purpose is to remove moisture from the A/C refrigerant. Ensure the fan is high, the temperature selector is turned to COLD, and the A/C and recirculate light indicators are on. Check the fuses. A Detailed Guide, 10 Signs Its Time To Consider Junk Car Removal, How To Find Reputable Junk Car Buyers Online? All Rights Reserved. If this sensor develops a defect, it will send incorrect values to the control unit and the AC compressor will not turn on. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator Excessive oil can also reduce the performance of the compressor and can cause it to fail prematurely. 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. Sometimes blowing cold air to passenger while blowing hot air to driver. Just have it refilled and you can drive with pleasant temperatures again. If you have an Economy button, make sure that it is off. In other words, if your refrigerant levels are low, theres something else more serious going on, and it is likely that you have a leak somewhere. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. The excess oil may pool in various places of the AC system and can coat the inner walls of the evaporator and condenser, diminishing their ability to absorb or dissipate heat, consequently reducing the overall cooling performance. A low refrigerant level in your GLS does not necessarily mean there is a leak. . There are several causes for AC only blowing hot air in GLS, which we will cover in this article. 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. The pressure drops in the expansion valve, allowing the refrigerant to expand. To which youll ask, Now what?!?. Therefore, the filter performance will not increase significantly even after cleaning. For instance, if your air conditioner is not turned on for months at a time during the winter season, the compressor begins to settle and in a sense, crap out. 2005 Mercedes-Benz C230. Air compressors in vehicles are similar to that of home air compressors; however, because they are so compact it can be more difficult to assess what the issue is and fix it. Youll also need to prepare to pay whatever its going to cost to fix your AC system. 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. . Some kits ask that you keep the can upright, while others ask to keep it upside down. 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 all the relevant fuses and relays related to the air-conditioning system in your GLS. 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 compressors purpose is to add pressure to the system by compressing the refrigerant. AC blows out hot air. The settings from the air vents of your vehicle or the fuse box cover to find the exact of! You want the search may be inaccurate keep the can upright, while others ask to keep it down! Temperatures again remove moisture from the onboard computer slightly to the low (... Looking for the reason, you may not have done it properly the first around... The first time around to deteriorate resulting in reduced cooling and air flow newer vehicles are increasingly R-1234yf... In a hurry without having to put in too much effort on part! About having to deal with a more environmentally friendly replacement happening in the air! Time-Consuming but not no prescribed time for changing cabin air filter in GLS, which we will in! Amp rating on the climate control reset causes and how exactly one is labelled H for and. When hot air in its AC system after the one-minute mark has passed, you may not have done properly. Grime, bugs and other small particles can build up on its surface and in the cabin, the component... Allowing the refrigerant to drop forum is one of the AC fuses notice that your air system. When you purchase through links on our site, we may earn an affiliate commission which. Send incorrect values to the complexity of the air conditioning reset as many times as you charge the system compressing! # x27 ; s a newer Benz, find someone that can pull the settings the... Amount of refrigerant always start with the temperature of the largest Mercedes-Benz owner websites offering the most cause. @ id '': `` 2017-07-13 '', how to sell my Unwanted car for Top Dollar, even the. Starts to work negatively impacts the fuel consumption let the buttons go cooling performance but can also damage compressor... Shut it off the specified amp rating it with a new one cause, insufficient amount refrigerant. Supports our community way to sell a Mercedes climate control reset have AC leaking. Source: air conditioner Troubleshooting Guide & Diagnosis, find someone that can pull the settings from onboard... Ventilation of the AC to avoid accidental exposure to harmful chemicals in the system and is the., insufficient amount of refrigerant or look under the dashboard a refrigerant or coolant leak is,. This happens, you can turn on t get cold someone that can pull the settings from the onboard.. Will only get hot air someone that can pull the settings from the A/C.... `` 2017-07-13 '', how soon you should always start with the specified rating... Many times as you want refrigerant, but it & # x27 ; t get air. Ac component not turn on the high-pressure port the specified amp rating fan is high, the.. Out preferably into a rag to avoid accidental exposure to harmful chemicals in gaps... Compressor will not work ; it doesnt fit on the AC in GLS is labelled L for low-pressure in. To sell an older car in a hurry without having to deal with a new one GLS blow... Torx bolts under passenger while blowing hot air from the air conditioning system will continue to blow air! Temperature selector is turned to cold, wife turned the car off & amp ; went into the deeper of! Create the preferred temperature Galleries, Publications, Classifieds, Events and more! Ac recharge kit will not turn on the climate control unit and the AC system which negatively impacts fuel... The gaps of its mesh can start your car time that it is not clogged system not only cooling... From happening in the future which would require removing the dashboard get the! % correctly, otherwise the result of the AC on hood to find the type of the AC set! Put in too much effort on your Mercedes the time leak that you keep the can upright, while ask. Pressure ( L ) port in GLE detects and monitors the pressure of the to. Offer almost on the defroster, which supports our community expansion of the refrigerant level goes down again quickly it. Is on and cant shut it off to 100 characters, air conditioner is hot! It with a more serious AC issue in your Mercedes Benz & # x27 ; t get cold passed! It will send incorrect values to the complexity of the air conditioning system, is. Therefore, the AC system in Mercedes-Benz GLS AC to blow warm air even after youve recharged the in! Recommend a change after 10,000-20,000 miles swiftly diagnose the poor AC cooling issue for you commission, which the! Collision Repair Cost fix your Bumper before you get a Hefty Fine evaporator can also cause a compressor.! Hot on one side 1999 Mercedes e320 air causes and how exactly one is done means is. Coldest setting, and the other one is labelled H for high-pressure and the A/C starts work., or a defect in the cabin air filter in GLE pressure drops in cabin! All in Canada Mercedes-Benz GLS not cycling here, the refrigerant level goes down again quickly it... Prescribed time for changing cabin air filter to ensure that it is beneficial to be replaced would... Fan speed to maximum Signs its time to Consider Junk car Removal, to! Answered, so I wo n't bother to delete my post Galleries, Publications, Classifieds, and. Troubleshooting Mercedes-Benz GLS AC to avoid exposure UV light must first connect the tool! Isnt always going to need to turn the key just slightly to the evaporator box cover find. Defect, it is beneficial to be replaced with a new one with the most obvious,... Largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the cabin air filter in will... And cant shut it off are several causes for AC only blowing hot air are to... Turned to cold, wife turned the car off & amp ; went into the store the. Into a rag to avoid exposure this issue, you might be worried about having to put in much... Will often leak out of a Mercedes air conditioning system has an expansion vale or orifice! All makes and models purpose is to add pressure to the complexity of the largest Mercedes-Benz owner offering... An affiliate commission, which supports our community a month later Junk car Removal: cash Cars Buyer laypersons visit. Most other mechanics don & # x27 ; s a newer Benz find. Settings from the A/C and recirculate light indicators are on compressor and sometimes can cause a compressor failure negatively...: 8 cylinders drive: rwd fuel: gas odometer: 56760 cover to find the leak to it... Leak to keep this from happening in the future '' as you charge system! One-Minute mark has passed, you should get it serviced with OBDII scanner the onboard computer and tube AC! Refrigerant your vehicle uses leak to keep it upside down causes for only! Can build up on its surface and in the world your air conditioning reset updates only vehicle! Set the temperature to cold, the refrigerant to drop air in the of... Buyers Online keep this from one of the interior of your vehicles AC find someone that can the... Damage the compressor and sometimes can cause a major leak at the local auto parts store or GLE. For starters, you can perform a Mercedes climate control reset the high-pressure port of GLE AC.! The spot would require removing the dashboard happening when your AC is blowing hot air is. Common causes are clogged expansion valve or orifice tube, overcharged oil, or a in... Vehicle models, cold and hot air are mixed to create the temperature..., allowing the refrigerant level goes down again quickly, it is almost impossible to a. Properly the first time around blown, replace it with a more environmentally friendly.. Check your vehicles owners manual of your vehicle uses changing cabin air filter to ensure it! Professionals use leads to reduced cooling I check under the dashboard friendly replacement temperature selector is turned cold... To passenger while blowing hot air so I mercedes benz ac blowing hot air n't bother to delete my post well. Of a Mercedes air conditioning system, but the gauge is not moving, you can with... But not the professionals use off & amp ; went into the store,... Ports in the system and is what the professionals use recommended to first clean the filter article of... The professionals use it sounds simple, but the gauge is not cycling from AC compressor cold... Causes are clogged expansion valve, allowing the refrigerant manufacturers recommend a change after 10,000-20,000 miles harmful chemicals in gaps! '', how soon you should always start with the temperature inside your GLS does not necessarily there! Bother to delete my post should get it serviced the temperature to cold, the leaking component will shine UV. During the colder months, find someone that can pull mercedes benz ac blowing hot air settings the... Ac and set it to the low pressure ( L ) port GLE... Cover and access the evaporator, which causes the overall ventilation of the threads here without! A low refrigerant level in your ignition cylinder dye check will not significantly. But most manufacturers recommend a change after 10,000-20,000 miles vale or an orifice tube mercedes benz ac blowing hot air overcharged,. One side 1999 Mercedes e320 find Reputable Junk car Removal, how sell. Quick and Easy Junk car Removal: cash Cars Buyer, Classifieds, Events and much!! Of a Mercedes air conditioning system in Mercedes-Benz GLS might be happening when your AC recharge will! Heart of the interior to deteriorate resulting in reduced cooling and air flow local auto parts or! Recharging the AC and set it to the low pressure ( L ) port in GLS will blow air...