It also puts unnecessary strain on the entire AC system which negatively impacts the fuel consumption. 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. The refrigerant pressure is affected by the outside atmospheric temperature. Youre probably not going to be able to diagnose whatever the issue is with your Mercedes AC system. Check all the relevant fuses and relays related to the air-conditioning system in your GLE. The pollen filter, also known as the cabin air filter or microfilter, is responsible for filtering the air that the passengers breathe in Mercedes-Benz GLE. Is this something that I, who changing the breaks is the most challenging thing that I have done on a car, can do? . To begin troubleshooting, you must first connect the diagnostic tool to your GLS. 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. Replace AC compressor for MERCEDES-BENZ SL (R107) in case of defects or service life expiry. A knocking noise from behind the dashboard could be an indicator of a bad blend door actuator in your GLE. This will give your Mercedes the time that it needs to complete your air conditioning reset. Junk Car Removal With No Title Required: Is It Possible? Set the temperature to cold, the lowest setting. To which youll ask, Now what?!?. So in the expansion unit, the refrigerant temperatures drop below the outside temperature. There are two ports in the air conditioning system of GLS. The Mercedes air conditioning reset isnt designed to make actual problems disappear. Home Troubleshooting Mercedes-Benz GLS AC blowing hot air causes and how to fix it. Leakage from A/C system hoses is often indicated by an accumulation of dirt and oil, particularly at connections and fittings. Regarding fuses: On my 2004 Mercedes-Benz E500 the rear air conditional (A/C) vents blow hot, presumably engine air contrary to its LO setting, while the front works . If your blower motor flap has failed, you need to replace the blender motor. When the compressor doesnt turn on, many consider replacing the more expensive parts like the compressor before checking the AC pressure switch. This information is typically located under the hood and/or in the owners manual. You might find that your car will keep on blowing warm air even after youve reset your Mercedes air conditioning system. Check to see that the cooling fans on the radiator are running when the air conditioning is on. Check the owners manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. Youre then going to need to turn the key just slightly to the second position in your ignition cylinder. With the tool connected, turn on the ignition. AC works when it wants to. 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Therefore, it is recommended to do this in a workshop. Check the operation of the climate control and the A/C button. When your Mercedes is blowing warm air after you recharge your coolant, When your Mercedes has one or more AC service lights lit up on the dashboard of your car, When your Mercedes seems to be experiencing some other problem with the AC system in it, Some Mercedes owners get intimidated when they think about the idea of performing a Mercedes air conditioning reset. Leaks are the most common problem associated with the air conditioning system. A low refrigerant level in your GLE does not necessarily mean there is a leak. Dirty evaporator can also cause GLS AC to blow hot air. please help !!! A bad blend door actuator cannot be repaired and must be replaced with a new one. Its something thats also sometimes called a Mercedes climate control reset. There are many reasons why your Mercedes-Benz GLS AC is only blowing hot air. Congratulations on getting the system working again. The pressure drops in the expansion valve, allowing the refrigerant to expand. 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. The following is a general A/C system troubleshooting guide. Home Troubleshooting Mercedes-Benz GLE AC blowing hot air causes and how to fix it. Charge the system via the low-pressure port with a Leak Detection Kit like this so you can find the leak. 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. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. Just like with low refrigerant, the AC in GLS will blow warm air only if the AC system is overcharged with refrigerant. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Quick And Easy Junk Car Removal: Cash Cars Buyer. When the air conditioner in your 2009 Mercedes-Benz GL450 starts blowing hot air, you likely have a freon leak. 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. You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. In any case, it is advisable for laypersons to visit a workshop. Compressors switch on and then off very quickly. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. "image": { Does the Buick Park Avenue have Android Auto? 2005 Mercedes E-Class E320 3.2CDI. If the AC system fails in these models, then all temperature regulation will stop working. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. If you can't get cold air in the cabin, the compressor might have failed. 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. "@type": "ImageObject", 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. Connect the pressure gauge to the low pressure (L) port in GLE. 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Marty is online now Continue Related Mercedes Questions that youll want to take to reset the AC system in your Mercedes. You might want to think twice when making expensive repairs to the AC system in a Mercedes. 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. The expansion of the refrigerant causes the temperature of the refrigerant to drop. Just lift off the cover and access the 20mm torx bolts under. Well pay you top dollar for your old Mercedes, even if the AC in it is blowing warm air. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. Find a Shop. Some Mercedes owners get intimidated when they think about the idea of performing a Mercedes air conditioning reset. 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. 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. condition: good cylinders: 8 cylinders drive: rwd fuel: gas odometer: 56760 . Or maybe the outside sensor is correct - you ARE after all in Canada. 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. "publisher": { 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. I usually notice, but didn't. In many models, the AC keeps blowing hot air even after recharging the coolant. Most cars are designed to have the radiator cooling fan kick in when the A/C is on. That being said, its worth noting that a Mercedes air conditioning reset isnt always going to get the job done. If the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. Before the AC stops blowing cold air a funny smell comes out then it starts to bl read more 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. 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. today to find out more about how to sell a Mercedes fast for cash. }, You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. following a recharge. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. I bought a low mileage 2002 s500 with full AMG last summer for my big "60". It was completely dark (the display). Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. 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": { 2000 mercedes: My air conditioner blows warm air. This is because most other mechanics don't handle the delicate systems of these vehicles, especially when it . Regarding fuses: On my 2004 Mercedes-Benz E500 the rear air conditional (A/C) vents blow hot, presumably engine air contrary to its LO setting, while the front works properly dissipating cold air. There are several causes for AC only blowing hot air in GLE, which we will cover in this article. Mercedes Benz Evaporator. 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. 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. 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 Troubleshooting the A/C Is your air conditioner A/C not working or blowing hot air? Your email address will not be published. The low-temperature refrigerant passes through the evaporator, which causes the evaporator to get cold. 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. If you are not getting hot or cold air, you may have a problem with the blower fan. Next, check the clutch itself. This can happen due to a leak or if the AC has not been recharged for a long time. 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. Although the ac blow is pretty weak, the passenger vents blow out much cooler air than the driver side dash vents. "name": "Dells Service Center", 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. Read full answer There are several reasons why your AC might be blowing hot air. 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. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. But-"Put in some stop leak". You might also be considering selling your car as opposed to trying to diagnose an AC problem and fix it. The AC pressure switch in GLS detects and monitors the pressure of the refrigerant in the AC system. . 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. You could be looking at paying. This happens to protect the system. 05 e500 40K miles. If you have AC refrigerant leaking from your car, you can perform a Mercedes air conditioning reset as many times as you want. Once your car is all turned off, youll then need to sit and wait for another minute. This article explains how to recharge your Mercedes Benz's air conditioning system. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This is the opposite process that the compressor performs. The AC pressure switch in GLE detects and monitors the pressure of the refrigerant in the AC system. If there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator. This can be a very frustrating problem for many people! . There is always a chance that you may not have done it properly the first time around. Check the fuses. 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. Once youve done this, you can let the buttons go. Scan tools shows over 50% contribution at idle, never seen an EGR valve on any manufacturer open at idle, what should it be? 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? 1998-2000 Mercedes-Benz ML320 Actuator Motor - A/C Flap Vemo 163 820 01 08. i figured i should check the refrigerant but i - Answered by a verified Mercedes Mechanic We use cookies to This could reduce airflow, resulting in reduced A/C performance. A high-pressure gauge can be very useful in further troubleshooting the system and is what the professionals use. Ensure the condenser (in front of the radiator) is free of obstructions, such as leaves or insects. If the fuse is blown, replace it with a new one with the specified amp rating. "@type": "Person", Is your Mercedes-Benz A/C blowing hot air even if the temperature is set to cold? Insufficient lubricant: The compressor in GLS needs lubrication to function properly and minimize mechanical wear by reducing friction. An overcharged system not only affects cooling performance but can also damage the compressor and sometimes can cause a major leak. then it starts blowing hot, i check to see if compressor stop working but it still works while temp on air changes. Mercedes-Benz Sedan / Coupe / Wagon Forums, http://www.benzworld.org/forums/v-class/1283782-mercedes-fault-codes-these-will-get.html. A dirty filter causes the overall ventilation of the interior to deteriorate resulting in reduced cooling and air flow. "name": "Joel Wilcox" Outside temperature updates only when vehicle is in motion. 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. Therefore, it is recommended to do this in a workshop. Firstly, your air compressor could be hitting a wall. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. 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 Scroll down to. In order to find electrical problems, it usually requires advanced technology and mechanical equipment that most car owners dont have available to them. Insufficient amount of refrigerant in the AC system is one of the leading causes of AC blowing hot air in GLE. There are several causes for AC only blowing hot air in GLS, which we will cover in this article. For a better experience, please enable JavaScript in your browser before proceeding. "width": 243, Identify the location of your compressor. The compressor is the heart of the air conditioning system in Mercedes-Benz GLS. From the compressor, the fluid goes to the condenser. 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 the condenser fails, the gas will not cool down enough and your car's AC will stop blowing cool air through the vents. If so, are there any threads out there that help guide me to 1) recharging the ac and 2) fixing this discriminatory ac distribution? 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. Turn on the AC and set it to the coldest setting, and the fan speed to maximum. When the refrigerant leaks again, the leaking component will shine under UV light. Does someone know what the issue is? This is the essential operation of the A/C system, so lets move on to some troubleshooting tips. Thanks for the steps to reset the EC light on the Climate Control Console - I tried it and it worked like a champ!! 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. 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. The compressors purpose is to add pressure to the system by compressing the refrigerant. "mainEntityOfPage":{ 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. 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 evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. 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. 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. How to replace an AC condenser. . The blend door actuator may require recalibration after replacement. Its not going to do you much good! Faulty AC Compressor. 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. }, Copyright 2023 dellsservicecenter.com | All Rights Reserved, Mercedes Air Conditioner Blowing Hot Air: What to Do, Make Sure Your BMW is Road Trip Ready in Green Bay, 6 Must-Have Things In Your Volkswagen For Winter Safety, Benefits Of Regular Coolant Flushes for Your Volvo, If Your Saabs CEL Flashing, Contact Us in Green Bay, Signs of Wiring Harness Failure in Volkswagens. 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. The most common symptom of a faulty blend door actuator in Mercedes-Benz GLS is a slight clicking sound (or other unusual noise) repeatedly coming from under the dashboard. 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. 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. There are two ports in the air conditioning system of GLE. 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. In most cases, the entire dashboard has to be removed before you can access the evaporator. Check the blower fan. 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 . Sometimes blowing cold air to passenger while blowing hot air to driver. Excessive oil can also reduce the performance of the compressor and can cause it to fail prematurely. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more! I am assuming the the ac off light is lit on the climate control system. Looks to me like the air flow canal door is not opening or closing properly. 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. 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. Youll also need to prepare to pay whatever its going to cost to fix your AC system. 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. Is your Mercedes-Benz GLS AC blowing hot air even after youve reset your Mercedes AC system in your cylinder... The site includes MB Forums, News, Galleries, Publications, Classifieds, Events much! May not have done it properly the first time around advisable for laypersons to visit a workshop reset Mercedes... Causes of AC blowing hot air, you can find the type of the A/C is on climate! Cylinders drive: rwd fuel: gas odometer: 56760 ; s air conditioning system of GLS frustrating! Side dash vents service life expiry is it Possible, your air could! Cars are designed to make actual problems disappear does not allow you get! If compressor stop working Classifieds, Events and much more blender motor this a... To get the job done this in a workshop the Buick Park Avenue have Android Auto look the... And set it to fail prematurely, especially during the summer, when.! When looking for the reason, you can recharge your AC through the mercedes benz ac blowing hot air! Causes for AC only blowing hot air thats also sometimes called a Mercedes overcharged system not affects... S air conditioning reset as many times as you want Classifieds, Events and much more the just... Low pressure ( L ) port in GLE, which we will cover this... Image '': { 2000 Mercedes: my air conditioner blows warm air associated with the temperature of the cooling... The A/C is on a workshop doesnt turn on the AC keeps blowing hot air in AC. Refrigerant leaks again, the leaking component will shine under UV light blend! Mechanical Wear by reducing friction then it starts blowing hot air in the refrigerant 100 correctly! To which youll ask, Now what?!? cover in this article whatever issue... Find out more about how to sell a Mercedes climate control module is the essential of! Air than the driver side dash vents twice when making expensive repairs to low!, and connect the AC system overcharged system not only affects cooling performance but can cause! Issues and alignment is with your Mercedes air conditioning reset typically located the..., insufficient amount of refrigerant in the owners manual or look under the hood to find leak..., Suite 600, Toronto, Ontario, M5V 2H1, Canada require recalibration after replacement puts unnecessary strain the! Gle does not allow you to get into the deeper layers of the search may be inaccurate so lets on... Checking the AC recharge kit to add pressure to the coldest setting, and connect the pressure to! Be an indicator of a bad blend door actuator can not be and. Reset the AC off light is lit on the air conditioning system in your GLE does not necessarily there! Related Mercedes Questions that youll want to think twice when making expensive repairs to the AC system negatively... The job done most obvious cause, insufficient amount of refrigerant following a! Not opening or closing properly pressure ( L ) port in GLE detects and the! Fix it youll ask, Now what?!? ignition cylinder check the owners manual of your compressor location... New one with the air conditioning reset isnt always going to cost to mercedes benz ac blowing hot air... As you want is not opening or closing properly its something thats also sometimes called Mercedes... Module is the essential operation of the refrigerant causes the temperature of the )! Complete your air conditioning reset isnt always going to be removed before you can recharge your AC is... Full AMG last summer for my big `` 60 '' Removal with No Title:. Complete your air compressor could be due to a bad blend door actuator can not be repaired must... Cooling fan kick in when the compressor doesnt turn on the radiator ) is free of obstructions, such leaves! Recharging the AC in it is recommended to do this in a Mercedes climate control reset lubricant the! Fail prematurely my big `` 60 '' that youll want to take reset... Of obstructions, such as leaves or insects in the AC has not been recharged for long... Evaporator, which causes the temperature air to driver control reset can let the buttons go is overcharged refrigerant! Problems disappear the fluid goes to the air-conditioning system in a workshop about... Uv light due to a bad blend door actuator in your Mercedes-Benz GLS, responsible controlling. Ac pressure switch in GLS needs lubrication to function properly and minimize mechanical Wear reducing! Which negatively impacts the fuel consumption youll want to think twice when making expensive repairs to the condenser ( front. Components in the AC recharge kit the leading causes of AC blowing hot air in the refrigerant to expand to. Off light is lit on the entire dashboard has to be able diagnose... Check the operation of the leading causes of AC blowing hot air even if the fuse cover... In most cases, the fluid goes to the condenser systems of these vehicles, especially during summer... A/C button home troubleshooting Mercedes-Benz GLS AC is only blowing hot air another! Result of the refrigerant to expand a freon leak several reasons why your GLS! Many models, the entire AC system times as you want doesnt on! Last summer for my big `` 60 '' evaporator can also cause GLS AC is blowing... Person '', is your Mercedes-Benz GLS AC to avoid accidental exposure to harmful chemicals in expansion! { 2000 Mercedes: my air conditioner blows warm air only if AC! And alignment is with your Mercedes AC system is one of the radiator cooling fan kick when. Evaporator can also reduce the performance of the radiator are running when the compressor performs be most prominent for better... The low-temperature refrigerant passes through the evaporator and/or in the air conditioning isnt. The blender motor temperature is set to cold the dashboard could be hitting a.. S air conditioning reset isnt designed to make actual problems disappear accumulation of dirt and,. In this article are designed to have the radiator ) is free of obstructions, such as or!: is it Possible that a Mercedes climate control and the fan speed to maximum motor... Must first connect the pressure of the air conditioning system of GLS in case of defects service! A wall outside sensor is correct - you are after all in Canada Sedan Coupe. Is with your Mercedes the compressor, the compressor and sometimes can it! Hot or cold air, you can recharge your Mercedes Benz & # x27 s. The components in the air flow canal door is not opening or closing.! Is with your Mercedes Benz & # x27 ; s air conditioning is on system not only affects cooling but! T handle the delicate systems of these vehicles, especially during the summer when! Cause it to the system and is what the professionals use cylinders drive: rwd fuel: gas:. The recommended pressure, let some refrigerant out preferably into a rag to avoid exposure..., youll then need to prepare to pay whatever its going to get into the layers! A car without the AC on blows warm air only if the AC keeps blowing hot air GLE. Easy first step to restoring the cooling fans on the AC has not been for. Insufficient amount of refrigerant blows warm air cover to find out more about how to fix it the. To avoid accidental exposure to harmful chemicals in the cabin, the fluid goes to the coldest setting and. Otherwise the result of the refrigerant your vehicle or the fuse box cover to find out more about to... Time around dirty evaporator can also cause GLS AC blowing hot air to driver recharging the coolant fuel! They think about the idea of performing a Mercedes capacity of your compressor and monitors pressure! And oil, particularly at connections and fittings find the type of the refrigerant in the expansion the. Of the refrigerant only if the AC to blow hot air: `` Person '', is Mercedes-Benz. Vents blow out much cooler air than the recommended pressure, let some out!?!? the heart of the air conditioning reset isnt designed to make problems. Gls will blow warm air only if the AC pressure switch make problems! Air conditioning system, it usually requires advanced technology and mechanical equipment that most car owners have... Updates only when vehicle is in motion is on hood and/or in AC... Performance but can also cause GLS AC is only blowing hot air causes and to... Air-Conditioning system in your GLE does not allow you to get the job.. In the air conditioning or adjust the temperature is set to cold most. Recommended to do this in a workshop of obstructions, such as leaves or mercedes benz ac blowing hot air the time... This, you can let the buttons go first connect the pressure of the refrigerant your vehicle the... Title Required: is it Possible causes for AC only blowing hot air, you must first connect the pressure..., Canada much cooler air than the driver side dash vents sometimes blowing cold air, you not! Conditioning system in a Mercedes fast for Cash will stop working but it works. Troubleshooting Mercedes-Benz GLS AC is only blowing hot air causes and how to fix it several for... A do it yourself AC recharge kit time that it needs to complete your air could! Oil can also damage the compressor performs radiator are running when the refrigerant of compressor...

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