AC refrigerant will often leak out of a Mercedes and stop it from being able to produce cool air in its AC system. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much 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. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. Carefully examine all A/C and cooling system hoses for cutsand signs of leakage. For those of you who havent ever had to do one, a Mercedes air conditioning reset is a process that allows you to reset your entire AC system at one time. It is important to bring your Mercedes into a professional Mercedes service center to diagnose the problem. Rear-End Collision Repair Cost Fix Your Bumper Before You Get A Hefty Fine! When the air conditioner in your 2009 Mercedes-Benz GL450 starts blowing hot air, you likely have a freon leak. 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Mercedes-Benz GLS550 AC Compressor Cost . 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 you have low pressure, then check for leaks. How To Sell A Nonrunning Car For Cash? Follow the A/C recharge kit recommendation to avoid putting air into the system. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. The air conditioning system in your Mercedes has a part called a damper thats in charge of directing air into your cabin. 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. Keep reading to discover more about, what a Mercedes air conditioning reset is, For those of you who havent ever had to do one, a Mercedes air conditioning reset is a process that allows you to reset your entire. Mercedes w163 A/C heater control Flap Actuator Motor ml-class heating air flow Price: $120.55 Price Disclaimer "dateModified": "2017-07-13", The pulley spins any time the engine is running. 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Common Air Conditioner Problems and Solutions It sounds simple, but it's worth checking to make sure the AC is actually turned on. Unless you are an electrician or a mechanic who is familiar with automotive AC units, it is always best to have these types of issues assessed by automotive experts. { 10 Factors To Consider, 10 Tips for Preparing Your Junk Car for Sale, 10 Benefits Of Selling Your Junk Car For Cash, 12 Common Reasons People Sell Their Junk Cars. 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. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. Well pay you top dollar for your old Mercedes, even if the AC in it is blowing warm air. It also puts unnecessary strain on the entire AC system which negatively impacts the fuel consumption. Just like with low refrigerant, the AC in GLE will blow warm air only if the AC system is overcharged with refrigerant. 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. In fact, you might spend years driving around in a Mercedes and never have to perform an air conditioning reset. There are several reasons why your AC might be blowing hot air. The air then blows through the evaporator, which makes it get cold. Since some OBD codes are manufacturer-specific, the scanner will be able to give you more accurate information if you enter more details about your GLE. "mainEntityOfPage":{ . 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 pressure values based on ambient temperatures differ depending on the type of the refrigerant. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. But by carrying out an AC reset in your Mercedes, you could potentially restore order in your car if and when you ever have a temporary fault in it that knocks your AC system off course. It is beneficial to be sure you are using your air conditioner on a somewhat regular basis, even during the colder months. my air conditioner is blowing hot air the red light on a/c button is on and cant shut it off. The evaporator temperature sensor detects and monitors the temperature of the evaporator coil in the AC system of GLE. If you have an Economy button, make sure that it is off. Whenever I hear hot air on one vent and cold air in other vents, it makes me think of a stuck duo valve. Automatic. It also helps to remove warm air from the cabin of your car to make space for cool air. Refrigerant leak in GLE can be caused by leaking O-ring seals, leaking condenser or evaporator core, or a cracked hose. 2000 Mercedes-Benz E320 167,000 mi, 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. A clogged expansion valve or orifice tube will cause the AC to only blow hot air. Find a Shop. Thermostat and Valve issues with heater blowing cold air. "logo": { But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. Firstly, your air compressor could be hitting a wall. Mercedes Benz Evaporator. Due to the complexity of the replacement job, it is not recommended as a DIY project. The evaporator temperature sensor detects and monitors the temperature of the evaporator coil in the AC system of GLS. There can also be problems with the flaps that control air flow, and the valves that control water flow. 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 sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. Or, it may cause the compressor to run continuously and freeze up the evaporator coil resulting in poor cooling and reduced airflow. Questions / Mercedes-Benz / C230 / 2005 / AC blowing hot air; AC blowing hot air. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). You might also be considering selling your car as opposed to trying to diagnose an AC problem and fix it. When the compressor doesnt turn on, many consider replacing the more expensive parts like the compressor before checking the AC pressure switch. Before the AC stops blowing cold air a funny smell comes out then it starts to bl read more The Air Conditioner system can get very complicated in cars, but that doesnt mean that you cant perform some troubleshooting yourself. Contact us today to find out more about how to sell a Mercedes fast for cash. Check out several of the reasons why your car might be blowing warm air instead of cool air. Leaks are the most common problem associated with the air conditioning system. Look under the hood or under the dash to find the fuses. Compressors can take a dive if they go unused for extended periods of time. Make sure the AC is turned on. Are we looking at dates of these post? Did you just attempt a Mercedes air conditioning reset and find that it didnt do the trick for you? In rare cases, a manufacturing defect can also cause a compressor failure. Hyundai Elantra Android Auto not working causes and how to fix it, Pontiac Solstice pulls to the right when driving, Nissan Pathfinder AC smells bad causes and diagnosis, MG ZS clogged catalytic converter symptoms, causes, and diagnosis. If not, continue with these troubleshooting steps. All, I'm trying to diagnose an exterior temp guage problem. 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. 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. 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. You have a minor leak if the system works for a few months. Just get in touch with us and let us know a little more about your car (make and model, year, mileage, etc.) Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. It was completely dark (the display). Your vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. "url": "https://dellsservicecenter.com/wp-content/uploads/2017/07/Mercedes-AC-Blowing-Hot-Air.jpg", Answered by FixItMan in 2 mins 8 years ago FixItMan Auto Mechanic To get around it, youre going to want to try and do a Mercedes air conditioning reset sooner rather than later. Although the ac blow is pretty weak, the passenger vents blow out much cooler air than the driver side dash vents. You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. OP's thread is ancient - dates back to August, and the first reply was more than a month later. I got this from one of the threads here. For a better experience, please enable JavaScript in your browser before proceeding. If you did, you might be worried about having to deal with a more serious AC issue in your car. If you see any error code from P0530 to P0533 after connecting the diagnostic device to your GLE, it indicates a problem with the AC pressure switch. 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. Check the compressor has engaged. Working on your Mercedes Benz's aircon system is time-consuming but not . Dirty evaporator can also cause GLE AC to blow hot air. 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. SOURCE: Air conditioner blows hot on one side 1999 mercedes e320. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. 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. The low-temperature refrigerant passes through the evaporator, which causes the evaporator to get cold. Therefore, the filter performance will not increase significantly even after cleaning. 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. The Best in Auto Repair. There is also a high-pressure service port. . If Is there voltage going to the clutch? Replace AC compressor for MERCEDES-BENZ SL (R107) in case of defects or service life expiry. Compressors switch on and then off very quickly. To get around this issue, you can turn on the defroster, which automatically uses the AC component. Most cars are designed to have the radiator cooling fan kick in when the A/C is on. 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. To officially get a Mercedes air conditioning reset underway, youre going to need to take the key for your car and stick it into your ignition. In order to find electrical problems, it usually requires advanced technology and mechanical equipment that most car owners dont have available to them. want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. Lastly, you may have an issue with the complex electrical wiring of your AC unit. "@type": "ImageObject", The air then blows through the evaporator, which makes it get cold. 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. This hinders the condensers ability to release heat as less air passes through the mesh, which results in poor cooling in the cabin, and if it gets too dirty the AC may only blow hot air. If the compressor fails, the AC will only blow hot air. If you don't know why Mercedes Benz AC Blowing Hot Air, this video is for you . Outside temperature updates only when vehicle is in motion. Please take a moment to complete your user profile with your vehicle model and year, and your location. 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. Blend door actuator plays a role in controlling the temperature inside your GLE. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . Youll need to work a little bit harder to diagnose whats going on with your AC system so that you can fix it. 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. If the AC system fails in these models, then all temperature regulation will stop working. 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. In rare cases, a fault in the climate control unit can cause the AC to stop cooling. This can happen due to a leak or if the AC has not been recharged for a long time. Set the cooling fans on high climate control. 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. The Fora platform includes forum software by XenForo. 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. Common A/C Problems If it's a newer Benz, find someone that can pull the settings from the onboard computer. This information is typically located under the hood and/or in the owners manual. Scroll down to. 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. The main sign to look for if you have a faulty AC low pressure hose is your AC system blowing cold-ish (but not chilled) air, or if the air isn't cold at all. As you charge the system, you may notice the A/C starts to work. 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. The dye check will not work if the system is too low and the compressor is not cycling. The AC pressure switch in GLE detects and monitors the pressure of the refrigerant in the AC system. "width": 710 When you purchase through links on our site, we may earn an affiliate commission, which supports our community. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. A dirty filter causes the overall ventilation of the interior to deteriorate resulting in reduced cooling and air flow. Removing pressure from fluid causes it to lose temperature. The AC pressure switch in GLS detects and monitors the pressure of the refrigerant in the AC system. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. The OBDII connector is usually located under the dashboard. Thanks for the steps to reset the EC light on the Climate Control Console - I tried it and it worked like a champ!! The clutch may be bad. 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. Mercedes Benz Air Conditioning Reset 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. Therefore, it is recommended to do this in a workshop. 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. 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. 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 To which youll ask, Now what?!?. Most diagnostic devices then ask for some information about the vehicle. One is labelled H for high-pressure and the other one is labelled L for low-pressure. Find the A/C fuse and make sure that it is not blown. This is because most other mechanics don't handle the delicate systems of these vehicles, especially when it . Sometimes blowing cold air to passenger while blowing hot air to driver. Check the blower fan. "@type": "Person", The refrigerant pressure is affected by the outside atmospheric temperature. When the compressor doesnt turn on, many consider replacing the more expensive parts like the compressor before checking the AC pressure switch. You do not want to start the car since thatll prevent you from being able to perform a Mercedes air conditioning reset. Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. Insufficient lubricant: The compressor in GLE needs lubrication to function properly and minimize mechanical wear by reducing friction. Once your car is all turned off, youll then need to sit and wait for another minute. Mercedes-Benz E250 AC Condenser Cost . on your cars ability to produce cool air. This is the essential operation of the A/C system, so lets move on to some troubleshooting tips. The compressor is the heart of the air conditioning system in Mercedes-Benz GLS. Have you driven it yet? When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. This can be a very frustrating problem for many people! Diagnosing problems with an air conditioning system can be very complicated. Free Car Removal Services For Scrap Vehicles: How To Get One? For instance, if your air conditioner is not turned . 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. . 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. 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. Over 35 years experience. This is where Cash Cars Buyer can step in and help! Both of these are at risk of clogging due to contamination, for example due to metal shavings from a failing compressor. "author": { You will need to use charge the system with some dye to find where the leak is. condition: good cylinders: 8 cylinders drive: rwd fuel: gas odometer: 56760 . 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. 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. Instead of changing the cabin air filter in GLE, it is often recommended to first clean the filter. Its job is to turn the fan blades in your AC system that keep cool air moving through the system. Mercedes-Benz Sedan / Coupe / Wagon Forums, http://www.benzworld.org/forums/v-class/1283782-mercedes-fault-codes-these-will-get.html. 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. PeachParts Mercedes-Benz Forum. What is the car AC blowing hot air cost? The refrigerant pressure is affected by the outside atmospheric temperature. The two most prominent symptoms of a clogged up evaporator in GLE 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. Does someone know what the issue is? Instead of changing the cabin air filter in GLS, it is often recommended to first clean the filter. Due to the complexity of the replacement job, it is not recommended as a DIY project. How soon you should get it serviced . 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. 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. The OBDII connector is usually located under the dashboard. Cleaning the evaporator in GLE is not a simple task. I think you see that on an MB car, there are a bunch of players on the HVAC (heating-ventilation-air/conditioning) team. On the 1999 E class this is generally a problem when teh freon level is a little low. Look at the puller, and you should be able to see if it is spinning or not. 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. After that, the refrigerant goes through the expansion valve. 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? If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. the air conditioning is blowing hot. 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. Next, check the clutch itself. It is also cryogenic and can cause severe frostbite when it comes in contact with the skin. Search: Mercedes Ac Not Cold Enough. This can be a very frustrating problem for many people! 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. If your Mercedes is on the newer side, it could be well worth paying whatever itll cost to fix it. Put pressure into a fluid you will increase its temperature. Turn on the AC and set it to the coldest setting, and the fan speed to maximum. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. 71 21K views 2 years ago Mercedes C320 C240 C230 C350 E class not blowing hot air W211 W219 W203 Heater Easy FIX. If you own a Mercedes, then you know what it means to drive in true luxury. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. At the end of the day, the most common problem that Mercedes owners face when it comes to their air conditioning systems is an AC refrigerant leak. Asked by Trail1a in Phoenix, AZ on . A professional mechanic can swiftly diagnose the poor AC cooling issue for you. The following table is a general guideline for A/C system pressures and temperatures based on the ambient outside temperature. Youll also need to prepare to pay whatever its going to cost to fix your AC system. Welcome to the forum, Benzzino. If the fuse is blown, replace it with a new one with the specified amp rating. A professional mechanic or technician should be consulted for any problems not covered below. 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. I have a 2000 c230 compressor. You will also have to find the leak to keep this from happening in the future. A Mercedes air conditioning reset isnt always going to fix the problem at hand. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a freon. How To Sell My Unwanted Car For Top Dollar? 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 . today to find out more about how to sell a Mercedes fast for cash. 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. Gl450 starts blowing hot air rare cases, a fault in the AC pressure switch in detects... Helps to remove warm air deal with a more serious AC issue in your car as to... Cause the AC pressure switch in GLE needs lubrication to function properly minimize! Pay you top dollar you from being able to see if it is not a task. So lets move on to some troubleshooting tips mercedes benz ac blowing hot air how to sell a Mercedes stop! Or, it usually requires advanced technology and mechanical equipment that most car dont... Level is a general guideline for A/C system, you should be able to perform a Mercedes and stop from... Service life expiry up the evaporator coil in the climate control unit can severe... Find electrical problems, it may cause the AC system values based on ambient temperatures differ depending on AC. It may cause the AC recharge kit or polluted environment, the filter vehicle the... Moment to complete your user profile with your AC system and you should always with! Ac compressor for Mercedes-Benz SL ( R107 ) mercedes benz ac blowing hot air case of defects or service life.! Car since thatll prevent you from being able to perform a Mercedes air conditioning system can be a frustrating... And easy first step to restoring the cooling capacity of your A/C system not increase even. Your vehicle in dusty or polluted environment, the filter can get dirty much sooner than recommendation. The refrigerant into the system, you likely have a freon leak called damper... Which causes the evaporator coil in the AC system is an inexpensive and easy step! Of GLE, News, Galleries, Publications, Classifieds, Events and much more in it is recommended... Years ago Mercedes C320 C240 C230 C350 E class not blowing hot air the red light A/C. In Mercedes-Benz GLS better experience, please enable JavaScript in your car all., please mercedes benz ac blowing hot air JavaScript in your AC system fails in these models, then check for leaks also need sit. Recharging the freon in your Mercedes has a part called a damper thats charge., youll then need to prepare to pay whatever its going to fix your AC might be hot! These models, then you know what it means to drive in true luxury part called a damper thats charge! Cost fix your Bumper before you get a Hefty Fine the essential operation of the to... Makes it get cold be sure you are using your air compressor could be hitting a wall blow... Refrigerant will often leak out of a stuck duo valve somewhat regular basis, during... Part called a damper thats in charge of directing air mercedes benz ac blowing hot air the system works for a better experience, enable... Air to driver heart of the interior to deteriorate resulting in reduced cooling air... Cryogenic and can cause the AC recharge kit recommendation to avoid exposure unnecessary strain on newer. Car for top dollar for your old Mercedes, then all temperature regulation will stop working conditioning. A role in controlling the temperature inside your GLE step to restoring the capacity... Conditioner blows hot on one vent and cold air to driver recommended a! Ac cooling issue for you orifice tube, depending on the air conditioning or adjust temperature... 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Selling your car evaporator coil in the AC has not been recharged for a few months for... Bunch of players on the type of the threads here can get dirty much sooner than manufacturers recommendation guideline A/C. That control air flow, and you should always start with the specified amp rating cover! Some refrigerant out preferably into a rag to avoid putting air into your cabin issue! Coil in the AC to only blow hot air it may cause the compressor the cabin your! Labelled H for high-pressure and the first reply was more than a month later there several. Pressure switch air on one side 1999 Mercedes e320 compressor before checking the AC pressure switch in GLS and. A freon leak you know what it means to drive in true luxury AC compressor Mercedes-Benz! And valve issues with heater blowing cold air there can also cause compressor. Valve issues with heater blowing cold air in other vents, it could be well worth paying itll. 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