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. Mercedes Benz Air Conditioning Reset But-"Put in some stop leak". "name": "Joel Wilcox" Home Troubleshooting Mercedes-Benz GLS AC blowing hot air causes and how to fix it. If you have low pressure, then check for leaks. Refrigerant leak in GLE can be caused by leaking O-ring seals, leaking condenser or evaporator core, or a cracked hose. In most cases, the entire dashboard has to be removed before you can access the evaporator. Insufficient lubricant: The compressor in GLS needs lubrication to function properly and minimize mechanical wear by reducing friction. "description": "If your Mercedes is blowing hot air out of the vents, here is some useful information that may help you figure out what the issue is." Whether you drive your Mercedes long distances, to work everyday, running errands, picking up kids, they are known for their consistent reliability. If there is no air flow or reduced air flow from the vents on your Mercedes-Benz GLE350, bad blower motor could be the culprit. When this happens, you will only get hot air from the air vents of your vehicles AC. For this you normally have to remove the front bumper to gain access to the condenser. Instead of changing the cabin air filter in GLS, it is often recommended to first clean the filter. Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. A dirty filter causes the overall ventilation of the interior to deteriorate resulting in reduced cooling and air flow. Just like with low refrigerant, the AC in GLE will blow warm air only if the AC system is overcharged with refrigerant. A professional mechanic or technician should be consulted for any problems not covered below. 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. If you have AC refrigerant leaking from your car, you can perform a Mercedes air conditioning reset as many times as you want. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. In fact, you might spend years driving around in a Mercedes and never have to perform an air conditioning reset. There is always a chance that you may not have done it properly the first time around. But youll be happy to know that its, easy to pull one off. Mercedes-Benz ML350 AC Low Pressure Hose Cost . Dirty evaporator can also cause GLE AC to blow hot 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. If the reading moves toward the normal range, continue until the system is charged. Once your car is all turned off, youll then need to sit and wait for another minute. But if its getting up there in age, you might be better off getting rid of it rather than spending a small fortune on AC repairs. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. 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. why your car might be blowing warm air instead of cool air. my exterior temp allways reads -38 degrees celcius reguardless of the temp outside, maybe that has something to do whith the temperature parameters you mentioned as one of the possible problems? The compressor could be disengaged because the system does not have enough refrigerant pressure to trip the low-pressure cutoff switch that cycles the compressor. 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 vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. The Mercedes air conditioning reset isnt designed to make actual problems disappear. This, unfortunately, isnt always easy to do! This can be a very frustrating problem for many people! 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. Start with the "AC stops blowing cold air" thread in the DIY sticky above, to extract trouble codes and current sensor values. The center part of the A/C pulley only engages when the A/C is on. Your Mercedes air conditioning system also has a part in it called a blower motor that plays a vital role in your AC systems ability to distribute cool air throughout your car. want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. 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. You will need to use charge the system with some dye to find where the leak is. at one time. Lastly, you may have an issue with the complex electrical wiring of your AC unit. The clutch may be bad. Heated seat. You might find that your car will keep on blowing warm air even after youve reset your Mercedes air conditioning system. A bad blend door actuator cannot be repaired and must be replaced with a new one. In many models, the AC keeps blowing hot air even after recharging the coolant. Did you just attempt a Mercedes air conditioning reset and find that it didnt do the trick for you? But youll be happy to know that its very easy to pull one off. In any case, it is advisable for laypersons to visit a workshop. Charge the system via the low-pressure port with a Leak Detection Kit like this so you can find the leak. "author": { A low refrigerant level in your GLE does not necessarily mean there is a leak. How the A/C System Works. 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. Both of these are at risk of clogging due to contamination, for example due to metal shavings from a failing compressor. There can also be problems with the flaps that control air flow, and the valves that control water flow. It is a good idea to make AC diagnostics part of your routine maintenance for your Mercedes; you dont want to get caught in the summertime without a cool retreat in your luxury vehicle. Next, check the clutch itself. Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. 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. Its something thats also sometimes called a Mercedes climate control reset. Youll also need to prepare to pay whatever its going to cost to fix your AC system. Due to the complexity of the replacement job, it is not recommended as a DIY project. If the fuse is blown, replace it with a new one with the specified amp rating. It was blowing cold, wife turned the car off & went into the store . Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. The blend door actuator may require recalibration after replacement. on your cars ability to produce cool air. But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. Cleaning the evaporator in GLS is not a simple task. Outside temperature updates only when vehicle is in motion. 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. Your Ultimate Guide, The Top Reasons To Consider Junk Car Removal Services, How To Choose A Reliable Junk Car Buyer? 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. }, Your Ultimate Guide, Best Cash Offers For Junk Cars Near Me: A Step-By-Step Process. }, 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. A worn out or weakened blower motor can also produce abnormal sounds when in operation. Although the ac blow is pretty weak, the passenger vents blow out much cooler air than the driver side dash vents. Faulty AC Compressor. If the fuse is blown, replace it with a new one with the specified amp rating. 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. 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 most cases, the entire dashboard has to be removed before you can access the evaporator. 2005 Mercedes E-Class E320 3.2CDI. 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. For starters, you can try to do the Mercedes air conditioning reset for a second time. 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. The refrigerant pressure is affected by the outside atmospheric temperature. This is the essential operation of the A/C system, so lets move on to some troubleshooting tips. You should continue to hold these buttons down until their individual LED lights start flashing for you. Its the simplest way to sell an older car in a hurry without having to put in too much effort on your part. Junk Car Removal With No Title Required: Is It Possible? Does the Buick Park Avenue have Android Auto? Check out several of the reasons why your car might be blowing warm air instead of cool air. So I bought a new sensor and installed it. The low-temperature refrigerant passes through the evaporator, which causes the evaporator to get cold. Car Dent Repair Cost The Price Depends on the Size, Location, and Number of Dents! A bad blend door actuator cannot be repaired and must be replaced with a new one. 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. 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. 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. 1992 mercedes-benz 500sl. "image": { Youll also need to prepare to pay whatever its going to cost to fix your AC system. You might finish a reset up only to find that your Mercedes is still blowing warm air. When temperatures rise, we tend to crank the air conditioning; it is important that before summer hits you are able to address any issues with your AC before you get stuck in a hot car without climate control. There is no prescribed time for changing cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). This might be of help in the future. You can rinse the condenser clean with a garden hose. With the tool connected, turn on the ignition. 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. }, unifi vs openwrt. An overcharged system not only affects cooling performance but can also damage the compressor and sometimes can cause a major leak. If your car's AC system stops blowing cold air out of the vents, stops working altogether, . To begin troubleshooting, you must first connect the diagnostic tool to your GLS. With the tool connected, turn on the ignition. 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All, I'm trying to diagnose an exterior temp guage problem. 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. Instead of changing the cabin air filter in GLE, it is often recommended to first clean the filter. It was blowing hot air and I brought it in to a Mercedes dealer for repairs. Insufficient lubricant: The compressor in GLE needs lubrication to function properly and minimize mechanical wear by reducing friction. Set the temperature to cold, the lowest setting. Before the AC stops blowing cold air a funny smell comes out then it starts to bl read more 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. Its something thats also sometimes called a Mercedes climate control reset. 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. "url": "https://dellsservicecenter.com/wp-content/uploads/2017/07/Mercedes-AC-Blowing-Hot-Air.jpg", If the condenser is dirty on your GLS, the simplest solution is to clean it. There are several things that you can try to get your AC system working again. Connect the pressure gauge to the low pressure (L) port in GLS. Scroll down to. 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. Or maybe the outside sensor is correct - you ARE after all in Canada. The air then blows through the evaporator, which makes it get cold. Text-to-speech function is limited to 100 characters, Air Conditioner Troubleshooting Guide & Diagnosis. "dateModified": "2017-07-13", Put pressure into a fluid you will increase its temperature. i just did the diagnosis and these are the values i got, this is in celcius. You might find that your car will keep on blowing warm air even after youve reset your Mercedes air conditioning system. Carefully examine all A/C and cooling system hoses for cutsand signs of leakage. Mercedes Benz ac blowing hot air - What you do now? 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. Check the AC compressor. Check all the relevant fuses and relays related to the air-conditioning system in your GLS. 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 leak can be diagnosed by injecting small amount of fluorescent dye into the AC 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. 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. Ac blows cold air for a few mins. One is labelled H for high-pressure and the other one is labelled L for low-pressure. I'll bet you'll find one of the controls is 'o. Audi, or Mercedes-Benz, you will need a special mechanic that costs even more than average. 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 instance, if your air conditioner is not turned . Your email address will not be published. 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Air - What you do now trying to diagnose an exterior temp problem... Reasons to Consider Junk car Buyer water flow must first connect the diagnostic to... Manufacturers recommend a change after 10,000-20,000 miles does not have enough refrigerant pressure to trip low-pressure... To your GLS be consulted for any problems not covered below car Removal with No Title Required: is Possible! A worn out or weakened blower motor can also produce abnormal sounds when in operation way to an... A very frustrating problem for many people gauge to the low pressure service port labelled L for.. Because the system is overcharged with refrigerant and the valves that control air flow leak Detection like... First connect the AC blow is pretty weak, the AC system is charged side dash vents is correct you.
mercedes benz ac blowing hot air