The air conditioning system in your Mercedes has a part called a damper thats in charge of directing air into your cabin. Connect the pressure gauge to the low pressure (L) port in GLE. 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. Automatic. 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. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. I got this from one of the threads here. "mainEntityOfPage":{ Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. More often than not, a Mercedes air conditioning reset is going to do the trick when your car. Check all the relevant fuses and relays related to the air-conditioning system in your GLE. "headline": "Mercedes Air Conditioner Blowing Hot Air: What to Do", 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. Technical Specs. 75 Answers. please help its 105 degrees today. 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 . If it's a newer Benz, find someone that can pull the settings from the onboard computer. Troubleshooting the A/C The clutch may be bad. If so, are there any threads out there that help guide me to 1) recharging the ac and 2) fixing this discriminatory ac distribution? }, 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. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. Refrigerant leak in GLS can be caused by leaking O-ring seals, leaking condenser or evaporator core, or a cracked hose. Its job is to turn the fan blades in your AC system that keep cool air moving through the system. Asked by Trail1a in Phoenix, AZ on . Therefore, it is recommended to do this in a workshop. 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. While the pictures in this article are of Mercedes Benz cars, this guide is written to apply to all makes and models. The dye check will not work if the system is too low and the compressor is not cycling. A car air conditioning system that needs repairs shouldn't affect the rest of your vehicle. If the evaporator temperature sensor develops a defect, the compressor may not turn on, causing the AC to only blow hot air in your GLS. The most common causes for AC blowing hot air in Mercedes-Benz GLE 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. . As a rule, there is no avoiding a change if the filter is dirty. 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. 2005 Mercedes E-Class E320 3.2CDI. The pressure that you see when you connect the fitting means that what refrigerant you have is hot and nothing else. "name": "Dells Service Center", Check out several of the reasons why your car might be blowing warm air instead of cool air. 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. "height": 75 Top Junk Car Removal Services In Chicago: FREE Vehicle Disposal. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. Sometimes blowing cold air to passenger while blowing hot air to driver. Over time, grime, bugs and other small particles can build up on its surface and in the gaps of its mesh. You should continue to hold these buttons down until their individual LED lights start flashing for you. Note: Dirty cabin air filter mostly only leads to reduced cooling. 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. "width": 710 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. For decades, Mercedes-Benz has been the gold standard of high-end vehicles, and the drivers who invest in Mercedes are never disappointed. Thermostat and Valve issues with heater blowing cold air. Less common causes are clogged expansion valve or orifice tube, overcharged oil, or a defect in the climate control unit. There is also a high-pressure service port. When the air conditioner in your 2009 Mercedes-Benz GL450 starts blowing hot air, you likely have a freon leak. Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. The expansion of the refrigerant causes the temperature of the refrigerant to drop. It also puts unnecessary strain on the entire AC system which negatively impacts the fuel consumption. 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. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. Check which type of refrigerant your vehicle uses. In rare cases, a fault in the climate control unit can cause the AC to stop cooling. Marty is online now Continue Related Mercedes Questions The AC pressure switch in GLS detects and monitors the pressure of the refrigerant in the AC system. 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. When this happens, you will only get hot air from the air vents of your vehicles AC. This will give your Mercedes the time that it needs to complete your air conditioning reset. When professional auto mechanics have their hands on your car routinely, they can spot troublesome repair needs early on before any significant repair work needs to be done. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. Is this a simple fix? my air conditioner is blowing hot air the red light on a/c button is on and cant shut it off. Just like with low refrigerant, the AC in GLS will blow warm air only if the AC system is overcharged with refrigerant. The leak can be diagnosed by injecting small amount of fluorescent dye into the AC system. Audi, or Mercedes-Benz, you will need a special mechanic that costs even more than average. However, that question really hadn't been answered, so I won't bother to delete my post. For a better experience, please enable JavaScript in your browser before proceeding. Identify the location of your compressor. A clogged expansion valve or orifice tube will cause the AC to only blow hot air. Next in the system is the receiver-drier, whose primary purpose is to remove moisture from the A/C refrigerant. Your Ultimate Guide, The Top Reasons To Consider Junk Car Removal Services, How To Choose A Reliable Junk Car Buyer? Scroll down to see the 3 steps that youll want to take to reset the AC system in your Mercedes. 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. There are several reasons why your AC might be blowing hot air. 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. If this sensor develops a defect, it will send incorrect values to the control unit and the AC compressor will not turn on. then it starts blowing hot, i check to see if compressor stop working but it still works while temp on air changes. Refrigerant leak in GLE can be caused by leaking O-ring seals, leaking condenser or evaporator core, or a cracked hose. 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. Just have it refilled and you can drive with pleasant temperatures again. Are we looking at dates of these post? Your vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. 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. Pay attention to the direction that you need to hold the can. 71 21K views 2 years ago Mercedes C320 C240 C230 C350 E class not blowing hot air W211 W219 W203 Heater Easy FIX. The compressor is the heart of the air conditioning system in Mercedes-Benz GLS. But-"Put in some stop leak". If you attempt to do a Mercedes air conditioning reset and your car continues to blow warm air, there could be any number of things causing this to happen. A Mercedes air conditioning reset isnt something that youre going to need to do on a regular basis. 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. Required fields are marked *. Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. 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. But youll be happy to know that its very easy to pull one off. Most cars are designed to have the radiator cooling fan kick in when the A/C is on. Close. 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. This can be a very frustrating problem for many people! When this happens, you will only get hot air from the air vents of your vehicles AC. "@type":"WebPage", A loose connection, broken valve, corroded seal, or damaged part can cause the Mercedes Benz air conditioning problems. 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 Freon level is adequate , in fact found to be in red zone on a A/C Pro read more Aaron Robert Lead Mechanic & Owner Technical Diploma 25 satisfied customers The a/c is blowing hot air suddenly after having an oil Mercedes Benz ac blowing hot air - What you do now? A professional mechanic or technician should be consulted for any problems not covered below. AC refrigerant will often leak out of a Mercedes and stop it from being able to produce cool air in its AC system. One of the most common complaints of Mercedes users is issues with the air conditioning system. Bad AC pressure switch can be diagnosed with OBDII scanner. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. The air then blows through the evaporator, which makes it get cold. In some vehicle models, cold and hot air are mixed to create the preferred temperature. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. Or, it may cause the compressor to run continuously and freeze up the evaporator coil resulting in poor cooling and reduced airflow. If the fuse is blown, replace it with a new one with the specified amp rating. The LED lights should continue to flash for about a minute or so before they stop flashing. Compressors can take a dive if they go unused for extended periods of time. I am assuming the the ac off light is lit on the climate control system. So, even if you recharged your GLE AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. If you are charging the system, but the gauge is not moving, you may have a large leak. Have you driven it yet? 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. Keep all loose-fitting clothing and body parts away from moving parts. 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. I have a 2004 Mercedes E500 and am having a problem with the rear console air conditioning. I have a 2000 S430. It also helps to remove warm air from the cabin of your car to make space for cool air. 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. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. Connect the pressure gauge to the low pressure (L) port in GLS. One of the key components of the A/C system is the compressor. You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. All lights/flasher, wipers, and horn work as expected including cigarette lighter. If the system works but only for a short time, again, you have a leak that you need to locate and repair. 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. May just unplugged or maybe the sensor is gone. Check the operation of the climate control and the A/C button. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). 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. Home Troubleshooting Mercedes-Benz GLE AC blowing hot air causes and how to fix it. For this you normally have to remove the front bumper to gain access to the condenser. Some of the most common Mercedes AC problems are: These kinds of problems cant be cured with a simple Mercedes air conditioning reset. Common Air Conditioner Problems and Solutions In most cases, the entire dashboard has to be removed before you can access the evaporator. Some kits ask that you keep the can upright, while others ask to keep it upside down. You might want to think twice when making expensive repairs to the AC system in a Mercedes. Due to the complexity of the replacement job, it is not recommended as a DIY project. In most cases, the entire dashboard has to be removed before you can access the evaporator. If the reading moves toward the normal range, continue until the system is charged. Thanks for the steps to reset the EC light on the Climate Control Console - I tried it and it worked like a champ!! Turn on the AC and set it to the coldest setting, and the fan speed to maximum. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. In many models, the AC keeps blowing hot air even after recharging the coolant. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. at one time. . 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. How soon you should get it serviced . "width": 243, 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 usually notice, but didn't. 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. 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 Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. You could be looking at paying. This is where Cash Cars Buyer can step in and help! Less common causes are clogged expansion valve or orifice tube, overcharged oil, or a defect in the climate control unit. "name": "Joel Wilcox" But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. 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. All You Need To Know, How To Get Money For A Junk Car? Carefully examine all A/C and cooling system hoses for cutsand signs of leakage. 2000 mercedes: My air conditioner blows warm air. Climate control module is the brain of the air-conditioning system in your Mercedes-Benz GLS, responsible for controlling all the components in the system. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. "datePublished": "2017-07-13", VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Check out. 2005 Mercedes-Benz C230. that youll want to take to reset the AC system in your Mercedes. This happens to protect the system. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. "author": { If you don't know why Mercedes Benz AC Blowing Hot Air, this video is for you . Answered by FixItMan in 2 mins 8 years ago FixItMan Auto Mechanic The center part of the A/C pulley only engages when the A/C is on. 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. A bad blend door actuator cannot be repaired and must be replaced with a new one. the air conditioning is blowing hot. If this sensor develops a defect, it will send incorrect values to the control unit and the AC compressor will not turn on. 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. It can be tough to figure out if you have a refrigerant leak without opening the hood and examining for evidence. A Detailed Guide, 10 Signs Its Time To Consider Junk Car Removal, How To Find Reputable Junk Car Buyers Online? 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In a Mercedes and stop it from being able to produce cool air in its AC system is.... Moves toward the normal range, continue until the recommended pressure has been the gold of! Some of the key components of the largest Mercedes-Benz owner websites offering the most common Mercedes problems... Just unplugged or maybe the sensor is gone moves toward the normal range, continue until the system overcharged! Even more than average need to know, How to find the type of the largest Mercedes-Benz websites. Drive Star Bit Socket set to remove warm air only if the box.