If you dont service the AC system in your GLE for a long time, the refrigerant level will eventually get so low that the system loses its cooling capacity. 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. You might want to think twice when making expensive repairs to the AC system in a Mercedes. You will need a Recharge Kit to purchase at the local auto parts store or. Maybe even charge the A/C system if needed. 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. Your email address will not be published. The A/C system is designed to disengage the A/C if the pressure in the lines is too low. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. Does someone know what the issue is? 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. How To Sell A Nonrunning Car For Cash? There is no prescribed time for changing cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. You should then turn your car off completely. A Mercedes air conditioning reset isnt always going to fix the problem at hand. 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. There are several things that you can try to get your AC system working again. 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. 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. 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 Sell My Unwanted Car For Top Dollar? There are many reasons why your Mercedes-Benz GLE AC is only blowing hot air. Look under the hood or under the dash to find the fuses. 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. The operation of the A/C in your car is based on the First Law of Thermodynamics if you want to learn the physics behind it. 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. For instance, if your air conditioner is not turned . 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. When this happens, you will only get hot air from the air vents of your vehicles AC. Just have it refilled and you can drive with pleasant temperatures again. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. There can also be problems with the flaps that control air flow, and the valves that control water flow. . Cleaning the evaporator in GLS is not a simple task. today to find out more about how to sell a Mercedes fast for cash. Thermostat and Valve issues with heater blowing cold air. 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. 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. Find a Shop. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. A bad blend door actuator cannot be repaired and must be replaced with a new one. Its job is to turn the fan blades in your AC system that keep cool air moving through the system. Tip And Tricks, 6 Eco-Friendly Ways To Dispose Of A Junk Car: All You Need To Know, How To Determine The Value Of A Junk Car? If not, continue with these troubleshooting steps. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. This information is typically located under the hood and/or in the owners manual. Over time, grime, bugs and other small particles can build up on its surface and in the gaps of its mesh. . In rare cases, a fault in the climate control unit can cause the AC to stop cooling. I will repeat that trick again and again and if I am lucky the cold air will blow. Is this something that I, who changing the breaks is the most challenging thing that I have done on a car, can do? 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 You should be charging the system while you have the car running. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. The most common symptom of a faulty blend door actuator in Mercedes-Benz GLE is a slight clicking sound (or other unusual noise) repeatedly coming from under the dashboard. A Mercedes air conditioning reset isnt always going to fix the problem at hand. The car has plenty of power and smoothes out off idle. Mercedes Benz ac blowing hot air - What you do now? Next, check the clutch itself. Due to the complexity of the replacement job, it is not recommended as a DIY project. 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. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. The dye check will not work if the system is too low and the compressor is not cycling. If the system is low, then start recharging the system using the instructions that came with your recharge kit. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. I am assuming the the ac off light is lit on the climate control 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. . "mainEntityOfPage":{ If the compressor fails, the AC will only blow hot air. 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. Have you driven it yet? Mercedes-Benz E250 AC Condenser Cost . It is also cryogenic and can cause severe frostbite when it comes in contact with the skin. Bad AC pressure switch can be diagnosed with OBDII scanner. The pressure drops in the expansion valve, allowing the refrigerant to expand. want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. Climate control module is the brain of the air-conditioning system in your Mercedes-Benz GLE, responsible for controlling all the components in the system. If you are charging the system, but the gauge is not moving, you may have a large leak. If you don't know why Mercedes Benz AC Blowing Hot Air, this video is for you . 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. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. 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. If your blower motor flap has failed, you need to replace the blender motor. Keep reading to discover more about what a Mercedes air conditioning reset is and how exactly one is done. The most common causes for AC blowing hot air in Mercedes-Benz C-Class 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. 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. The Air Conditioner system can get very complicated in cars, but that doesnt mean that you cant perform some troubleshooting yourself. 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. If the clutch engages and disengages rapidly, the refrigerant may be low. "@type": "ImageObject", Technical Specs. Text-to-speech function is limited to 100 characters, Air Conditioner Troubleshooting Guide & Diagnosis. Bad AC pressure switch can be diagnosed with OBDII scanner. Therefore, it is recommended to do this in a workshop. Before the AC stops blowing cold air a funny smell comes out then it starts to bl read more In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). 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. 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. The evaporator temperature sensor detects and monitors the temperature of the evaporator coil in the AC system of GLS. Carefully examine all A/C and cooling system hoses for cutsand signs of leakage. If this sensor develops a defect, it will send incorrect values to the control unit and the AC compressor will not turn on. In fact, you might spend years driving around in a Mercedes and never have to perform an air conditioning reset. The air conditioning system in your Mercedes has a part called a damper thats in charge of directing air into your cabin. 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. The center part of the A/C pulley only engages when the A/C is on. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Put pressure into a fluid you will increase its temperature. Dirty evaporator can also cause GLE AC to blow hot air. Cleaning the evaporator in GLE is not a simple task. . When the refrigerant leaks again, the leaking component will shine under UV light. However, that question really hadn't been answered, so I won't bother to delete my post. "width": 710 It was completely dark (the display). If your Mercedes is on the newer side, it could be well worth paying whatever itll cost to fix it. Its only going to be effective if there was a temporary fault in your system that stopped your AC from working. "publisher": { the air conditioning is blowing hot. Questions / Mercedes-Benz / C230 / 2005 / AC blowing hot air; AC blowing hot air. Suspension is with out issues and alignment is with out issues. Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. Connect the pressure gauge to the low pressure (L) port in GLS. condition: good cylinders: 8 cylinders drive: rwd fuel: gas odometer: 56760 . The LED lights connected to each of them should keep on flashing in your car even after youve stopped pressing the buttons down. AC works when it wants to. Just have it refilled and you can drive with pleasant temperatures again. If the compressor is not working, it could be the reason the AC is blowing hot air. Thanks to all the posters on this thread. Close. "dateModified": "2017-07-13", Compressors switch on and then off very quickly. 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. Note: Dirty cabin air filter mostly only leads to reduced cooling. 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.

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