If the reading moves toward the normal range, continue until the system is charged. To get around this issue, you can turn on the defroster, which automatically uses the AC component. 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. 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. 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. Mercedes Benz Air Conditioning Reset "image": { I'll bet you'll find one of the controls is 'o. Always wear safety glasses and gloves. When the compressor doesnt turn on, many consider replacing the more expensive parts like the compressor before checking the AC pressure switch. One is labelled H for high-pressure and the other one is labelled L for low-pressure. Due to the complexity of the replacement job, it is not recommended as a DIY project. 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. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! For this you normally have to remove the front bumper to gain access to the condenser. "@type": "Person", 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. I bought a low mileage 2002 s500 with full AMG last summer for my big "60". "headline": "Mercedes Air Conditioner Blowing Hot Air: What to Do", JavaScript is disabled. Quick And Easy Junk Car Removal: Cash Cars Buyer. Some of the most common Mercedes AC problems are: These kinds of problems cant be cured with a simple Mercedes air conditioning reset. 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. On the 1999 E class this is generally a problem when teh freon level is a little low. I usually notice, but didn't. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. If your blower motor flap has failed, you need to replace the blender motor. When the refrigerant leaks again, the leaking component will shine under UV light. the air conditioning is blowing hot. 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. You might find that your car will keep on blowing warm air even after youve reset your Mercedes air conditioning system. OP is no longer with us. Suspension is with out issues and alignment is with out issues. Close. 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. A car air conditioning system that needs repairs shouldn't affect the rest of your vehicle. . Search this forum and you'll find the outside sensor location. 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. 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. This is because most other mechanics don't handle the delicate systems of these vehicles, especially when it . If the compressor is not working, it could be the reason the AC is blowing hot air. But youll be happy to know that its very easy to pull one off. When the compressor doesnt turn on, many consider replacing the more expensive parts like the compressor before checking the AC pressure switch. PeachParts Mercedes-Benz Forum. The air then blows through the evaporator, which makes it get cold. 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. "@type": "BlogPosting", 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. Youll also need to prepare to pay whatever its going to cost to fix your AC system. 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. Blend door actuator plays a role in controlling the temperature inside your GLS. . 2022 Cash Cars Buyer. Mercedes-Benz GLS550 AC Compressor Cost . }, . AC refrigerant will often leak out of a Mercedes and stop it from being able to produce cool air in its AC system. But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. One of the most common complaints of Mercedes users is issues with the air conditioning system. Common Air Conditioner Problems and Solutions 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. Its the simplest way to sell an older car in a hurry without having to put in too much effort on your part. Be careful not to overcharge the system, either. I got this from one of the threads here. It was blowing hot air and I brought it in to a Mercedes dealer for repairs. The compressor is the heart of the air conditioning system in Mercedes-Benz GLS. Mercedes-Benz E250 AC Condenser Cost . If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. If the clutch engages and disengages rapidly, the refrigerant may be low. 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. 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. Turn the A/C ON. 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 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. 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. Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. Follow the A/C recharge kit recommendation to avoid putting air into the system. Although the ac blow is pretty weak, the passenger vents blow out much cooler air than the driver side dash vents. Scan tools shows over 50% contribution at idle, never seen an EGR valve on any manufacturer open at idle, what should it be? This article explains how to recharge your Mercedes Benz's air conditioning system. My AC is not blowing cold all fuses are good compressor not spinning.If this video helped you please hit that Like and Subscribe If only hot air comes out of the air vents in your GLE, then the problem probably lies somewhere else. 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. please help its 105 degrees today. If you have low pressure, then check for leaks. 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. Save my name, email, and website in this browser for the next time I comment. Ensure the car is running and the A/C is on while you get a reading. You should then turn your car off completely. 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. 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. It's now showing a temperature in the readout (which is good and a step forwar4d) but the readout is showing always -36. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. 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 . that youll want to take to reset the AC system in your Mercedes. In rare cases, a fault in the climate control unit can cause the AC to stop cooling. Check the operation of the climate control and the A/C button. Some kits ask that you keep the can upright, while others ask to keep it upside down. For a better experience, please enable JavaScript in your browser before proceeding. There are two ports in the air conditioning system of GLS. 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. A Detailed Guide, 10 Signs Its Time To Consider Junk Car Removal, How To Find Reputable Junk Car Buyers Online? How to replace an AC condenser. Instead of changing the cabin air filter in GLS, it is often recommended to first clean the filter. 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. 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. Identify the location of your compressor. Answered by FixItMan in 2 mins 8 years ago FixItMan Auto Mechanic Scroll down to. Dirty evaporator can also cause GLS AC to blow hot air. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. 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 . Check out. There are several reasons why your AC might be blowing hot air. Diagnosing problems with an air conditioning system can be very complicated. Ensure the fan is high, the temperature selector is turned to COLD, and the A/C and recirculate light indicators are on. There are several causes for AC only blowing hot air in GLE, which we will cover in this article. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. This can be a very frustrating problem for many people! VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. the AC system in my 2003 Mercedes-Benz is blowing only hot air. Make sure the AC is turned on. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. You do not want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. So, if you think that your Mercedess air conditioning is failing due to an electrical issue, you will most certainly want to have professionals check it out. The refrigerant pressure is affected by the outside atmospheric temperature. Heated seat. Ac blows cold air for a few mins. 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Outside sensor location car Buyers Online it is also cryogenic and can cause severe frostbite when it of your.... One of the replacement job, it is not working, it recommended.

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