Does someone know what the issue is? Diagnosing problems with an air conditioning system can be very complicated. The AC is independent of the exterior temperature sensor. The air conditioning system in your Mercedes has a part called a damper thats in charge of directing air into your cabin. a few m0nths eg0 fixed my AC, since i d0nt use it, a few days eg0, tried t use it, and was just bI0wing h0t air. Sounds strange to blow cold on one side and not the other but recharging the system is the typical repair. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. Keep reading to discover more about what a Mercedes air conditioning reset is and how exactly one is done. Over 35 years experience. Turn the A/C ON. From here, the refrigerant goes to the evaporator. 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 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. How To Sell My Unwanted Car For Top Dollar? Search this forum and you'll find the outside sensor location. 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. JavaScript is disabled. Check which type of refrigerant your vehicle uses. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. On the 1999 E class this is generally a problem when teh freon level is a little low. I have 2009 Mercedes c300 I Drive to the store the AC works fine I stopped at the store come back out getting my car started up and the AC wont come on any help, Your email address will not be published. Mercedes-Benz Maybach S580 AC Condenser Cost . Due to the complexity of the replacement job, it is not recommended as a DIY project. 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. . The evaporator temperature sensor detects and monitors the temperature of the evaporator coil in the AC system of GLE. Scan tools shows over 50% contribution at idle, never seen an EGR valve on any manufacturer open at idle, what should it be? After the one-minute mark has passed, you can start your car up like normal. 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. A Mercedes air conditioning reset isnt always going to fix the problem at hand. "url": "https://dellsservicecenter.com/wp-content/uploads/2017/07/Mercedes-AC-Blowing-Hot-Air.jpg", Identify the location of your compressor. }, 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. While the pictures in this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. Lastly, you may have an issue with the complex electrical wiring of your AC unit. If you can't get cold air in the cabin, the compressor might have failed. 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. thank you unitfreebie for all that information this is my first summer with this car, the ac was not working for as long as i have had it so i dont know the conditions underwhich it stoped working. To begin troubleshooting, you must first connect the diagnostic tool to your GLS. . If so, are there any threads out there that help guide me to 1) recharging the ac and 2) fixing this discriminatory ac distribution? Just have it refilled and you can drive with pleasant temperatures again. 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. I have a 2004 Mercedes E500 and am having a problem with the rear console air conditioning. The leak can be diagnosed by injecting small amount of fluorescent dye into the AC system. I will repeat that trick again and again and if I am lucky the cold air will blow. The refrigerant pressure is affected by the outside atmospheric temperature. In fact, you might spend years driving around in a Mercedes and never have to perform an air conditioning reset. With the tool connected, turn on the ignition. 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. 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. 2000 mercedes: My air conditioner blows warm air. 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. Mercedes-Benz GLS550 AC Compressor Cost . 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. The following is a general A/C system troubleshooting guide. This section will cover some common problems associated with the A/C system. Are we looking at dates of these post? You should continue to hold these buttons down until their individual LED lights start flashing for you. and well respond with an offer almost on the spot. "image": { This can happen due to a leak or if the AC has not been recharged for a long time. Read full answer For a better experience, please enable JavaScript in your browser before proceeding. This happens to protect the system. 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. 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. Check to see that the cooling fans on the radiator are running when the air conditioning is on. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. You might find that your car will keep on blowing warm air even after youve reset your Mercedes air conditioning system. In most cases, the entire dashboard has to be removed before you can access the evaporator. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. Charge the system via the low-pressure port with a Leak Detection Kit like this so you can find the leak. An overcharged system not only affects cooling performance but can also damage the compressor and sometimes can cause a major leak. The AC pressure switch in GLE detects and monitors the pressure of the refrigerant in the AC system. Bad AC pressure switch can be diagnosed with OBDII scanner. You could be looking at paying. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. Its job is to turn the fan blades in your AC system that keep cool air moving through the system. If Is there voltage going to the clutch? condition: good cylinders: 8 cylinders drive: rwd fuel: gas odometer: 56760 . PeachParts Mercedes-Benz Forum. Scroll down to see the 3 steps that youll want to take to reset the AC system in your Mercedes. Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This information is typically located under the hood and/or in the owners manual. As a rule, there is no avoiding a change if the filter is dirty. Due to the complexity of the replacement job, it is not recommended as a DIY project. 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. why your car might be blowing warm air instead of 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. The clutch may be bad. Follow the A/C recharge kit recommendation to avoid putting air into the system. Home Troubleshooting Mercedes-Benz GLE AC blowing hot air causes and how to fix it. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. You should be charging the system while you have the car running. This could reduce airflow, resulting in reduced A/C performance. 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. Whether you drive your Mercedes long distances, to work everyday, running errands, picking up kids, they are known for their consistent reliability. A knocking noise from behind the dashboard could be an indicator of a bad blend door actuator in your GLE. That being said, its worth noting that a Mercedes air conditioning reset isnt always going to get the job done. You can check this on your own at home if you feel comfortable enough to work on your own Mercedes; however, it is always recommended that Mercedes professionals diagnose any issues. You do not want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. 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. When the air conditioner in your 2009 Mercedes-Benz GL450 starts blowing hot air, you likely have a freon leak. So, even if you recharged your GLE AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. 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. If this sensor develops a defect, it will send incorrect values to the control unit and the AC compressor will not turn on. Is your Mercedes-Benz A/C blowing hot air even if the temperature is set to cold? 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. Leakage from A/C system hoses is often indicated by an accumulation of dirt and oil, particularly at connections and fittings. Automatic. 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. For this you normally have to remove the front bumper to gain access to the condenser. Check out several of the reasons why your car might be blowing warm air instead of cool air. Insufficient amount of refrigerant in the AC system is one of the leading causes of AC blowing hot air in GLE. Junk Car Removal With No Title Required: Is It Possible? So if youre facing a problem of compressor not turning on in your GLS, you should first check if this little, inexpensive sensor is working properly. i just did the diagnosis and these are the values i got, this is in celcius. 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. In some vehicle models, cold and hot air are mixed to create the preferred temperature. Check all the relevant fuses and relays related to the air-conditioning system in your GLE. There are two ports in the air conditioning system of GLE. Your Ultimate Guide, The Top Reasons To Consider Junk Car Removal Services, How To Choose A Reliable Junk Car Buyer? the AC system in my 2003 Mercedes-Benz is blowing only hot air. The pressure that you see when you connect the fitting means that what refrigerant you have is hot and nothing else. The leak can be diagnosed by injecting small amount of fluorescent dye into the AC system. Mercedes-Benz E250 AC Condenser Cost . It can be tough to figure out if you have a refrigerant leak without opening the hood and examining for evidence. Check the operation of the climate control and the A/C button. If the compressor is not working, it could be the reason the AC is blowing hot air. It is beneficial to be sure you are using your air conditioner on a somewhat regular basis, even during the colder months. Leaks are the most common problem associated with the air conditioning system. To get around it, youre going to want to try and do a Mercedes air conditioning reset sooner rather than later. This will give your Mercedes the time that it needs to complete your air conditioning reset. 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. Gather the right tools. You will also have to find the leak to keep this from happening in the future. Ensure the fan is high, the temperature selector is turned to COLD, and the A/C and recirculate light indicators are on. . MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. 2000 Mercedes-Benz E320 167,000 mi, 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. Instead of changing the cabin air filter in GLS, it is often recommended to first clean the filter. This can be a very frustrating problem for many people! 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