This article will overview the A/C system, common problems, and repairs you can perform independently. Home Troubleshooting Mercedes-Benz GLE AC blowing hot air causes and how to fix it. on your cars ability to produce cool air. You will need to use charge the system with some dye to find where the leak is. All, I'm trying to diagnose an exterior temp guage problem. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. Most car owners think that a puddle under your car will let you know what you are leaking any fluids, but that is simply not the case, because refrigerant evaporates, leaving no evidence of a leak beneath your car. 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. Bad AC pressure switch can be diagnosed with OBDII scanner. i just did the diagnosis and these are the values i got, this is in celcius. To get around it, youre going to want to try and do a Mercedes air conditioning reset sooner rather than later. AC not working, blows hot air on Mercedes S 430, S500, S600 For decades, Mercedes-Benz has been the gold standard of high-end vehicles, and the drivers who invest in Mercedes are never disappointed. "@type": "ImageObject", The air conditioning system in Mercedes-Benz GLE has a condenser coil that sits at the front of the vehicle, and is responsible for releasing the heat from the refrigerant into the ambient air. I'll bet you'll find one of the controls is 'o. If you are charging the system, but the gauge is not moving, you may have a large leak. . 2005 Mercedes-Benz C230. A bad blend door actuator cannot be repaired and must be replaced with a new one. 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. Note: Dirty cabin air filter mostly only leads to reduced cooling. Another issue that might be happening when your AC is blowing hot air is a refrigerant or coolant leak. Both of these are at risk of clogging due to contamination, for example due to metal shavings from a failing compressor. Start with the "AC stops blowing cold air" thread in the DIY sticky above, to extract trouble codes and current sensor values. 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 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. 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. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. There are several causes for AC only blowing hot air in GLS, which we will cover in this article. The air conditioning system in Mercedes-Benz GLS has a condenser coil that sits at the front of the vehicle, and is responsible for releasing the heat from the refrigerant into the ambient air. 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. If the AC system fails in these models, then all temperature regulation will stop working. Youll need to work a little bit harder to diagnose whats going on with your AC system so that you can fix it. By flowing through the condenser, the refrigerant loses heat, which converts into a warm liquid from hot gas. This is where Cash Cars Buyer can step in and help! why your car might be blowing warm air instead of cool air. unifi vs openwrt. 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. Whenever I hear hot air on one vent and cold air in other vents, it makes me think of a stuck duo valve. Text-to-speech function is limited to 100 characters, Air Conditioner Troubleshooting Guide & Diagnosis. 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. 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. 2000 Mercedes-Benz E320 167,000 mi, Mercedes w163 A/C heater control Flap Actuator Motor ml-class heating air flow Price: $120.55 Price Disclaimer 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. Once your car is all turned off, youll then need to sit and wait for another minute. Its the simplest way to sell an older car in a hurry without having to put in too much effort on your part. 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. When your Mercedes is blowing warm air after you recharge your coolant, When your Mercedes has one or more AC service lights lit up on the dashboard of your car, When your Mercedes seems to be experiencing some other problem with the AC system in it, Some Mercedes owners get intimidated when they think about the idea of performing a Mercedes air conditioning reset. Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. This will give your Mercedes the time that it needs to complete your air conditioning reset. 2001 Mercedes-Benz E320 60,000 mi, Visitor. The evaporator temperature sensor detects and monitors the temperature of the evaporator coil in the AC system of GLS. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The pressure drops in the expansion valve, allowing the refrigerant to expand. As a rule, there is no avoiding a change if the filter is dirty. Pay attention to the direction that you need to hold the can. 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. Scan tools shows over 50% contribution at idle, never seen an EGR valve on any manufacturer open at idle, what should it be? Once you have the key for your Mercedes in the second position in your ignition cylinder, you can then remove your hand from it so that you dont accidentally turn it any further. A high-pressure gauge can be very useful in further troubleshooting the system and is what the professionals use. at one time. 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. 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. today to find out more about how to sell a Mercedes fast for cash. Put pressure into a fluid you will increase its temperature. In many models, the AC keeps blowing hot air even after recharging the coolant. Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. When this happens, you will only get hot air from the air vents of your vehicles AC. I bought a low mileage 2002 s500 with full AMG last summer for my big "60". But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. But youll be happy to know that its very easy to pull one off. AC blows out hot air. So in the expansion unit, the refrigerant temperatures drop below the outside temperature. Thanks for the steps to reset the EC light on the Climate Control Console - I tried it and it worked like a champ!! Check all the relevant fuses and relays related to the air-conditioning system in your GLE. OP's thread is ancient - dates back to August, and the first reply was more than a month later. 05 e500 40K miles. Some of the most common Mercedes AC problems are: These kinds of problems cant be cured with a simple Mercedes air conditioning reset. Is your air conditioner A/C not working or blowing hot air? If it's a newer Benz, find someone that can pull the settings from the onboard computer. From the compressor, the fluid goes to the condenser. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. The pulley spins any time the engine is running. Note: Dirty cabin air filter mostly only leads to reduced cooling. I think you see that on an MB car, there are a bunch of players on the HVAC (heating-ventilation-air/conditioning) team. 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. Welcome to the forum, Benzzino. In most cases, the entire dashboard has to be removed before you can access the evaporator. But-"Put in some stop leak". Ensure the condenser (in front of the radiator) is free of obstructions, such as leaves or insects. Look under the hood or under the dash to find the fuses. Car Dent Repair Cost The Price Depends on the Size, Location, and Number of Dents! Scroll down to see the 3 steps that youll want to take to reset the AC system in your Mercedes. The evaporator temperature sensor detects and monitors the temperature of the evaporator coil in the AC system of 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. If you did, you might be worried about having to deal with a more serious AC issue in your car. 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. Just have it refilled and you can drive with pleasant temperatures again. Learn how to fix the problem by recharging the A/C system of your Mercedes-Benz with a refrigerant. The air then blows through the evaporator, which makes it get cold. Find a Shop. If the refrigerant level goes down again quickly, it means there is probably a leak. Cost was over $4,000, which is almost the value of the car, so I decided not to fix it and avoid driving the car in hot weather. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. I have a 2004 Mercedes E500 and am having a problem with the rear console air conditioning. Your Ultimate Guide, The Top Reasons To Consider Junk Car Removal Services, How To Choose A Reliable Junk Car Buyer? Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a freon. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. 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. Sounds strange to blow cold on one side and not the other but recharging the system is the typical repair. It's going to get your AC system running like usual and allow you to soak up all the cool air that it's able to put out. 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. Sorry my fault, it was 3/4 am in my region, please forgive me. Youll also need to prepare to pay whatever its going to cost to fix your AC system. 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. JavaScript is disabled. Charge the system via the low-pressure port with a Leak Detection Kit like this so you can find the leak. 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. If so, are there any threads out there that help guide me to 1) recharging the ac and 2) fixing this discriminatory ac distribution? "@type": "ImageObject", Less common causes are clogged expansion valve or orifice tube . 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. A cycling switch may be bad, a fuse may be blown, and the system may not have enough refrigerant pressure to trip the low-pressure cutoff switch that cycles the compressor. 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. Required fields are marked *. 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. . Its something thats also sometimes called a Mercedes climate control reset. For instance, if your air conditioner is not turned . 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. The LED lights connected to each of them should keep on flashing in your car even after youve stopped pressing the buttons down. }, Copyright 2023 dellsservicecenter.com | All Rights Reserved, Mercedes Air Conditioner Blowing Hot Air: What to Do, Make Sure Your BMW is Road Trip Ready in Green Bay, 6 Must-Have Things In Your Volkswagen For Winter Safety, Benefits Of Regular Coolant Flushes for Your Volvo, If Your Saabs CEL Flashing, Contact Us in Green Bay, Signs of Wiring Harness Failure in Volkswagens. Check out what you can find searching and see if it fits the description. . The Fora platform includes forum software by XenForo. 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. Read full answer following a recharge. 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. "name": "Joel Wilcox" Most cars are designed to have the radiator cooling fan kick in when the A/C is on. Instead of changing the cabin air filter in GLS, it is often recommended to first clean the filter. Most diagnostic devices then ask for some information about the vehicle. 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. Location of the controls is & # x27 ; o obvious cause insufficient. A little bit harder to diagnose whats going on with your AC is blowing hot air of. To reset the AC fuses diagnostic devices then ask for some information about vehicle... 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