To get around it, youre going to want to try and do a Mercedes air conditioning reset sooner rather than later. Free Car Removal Services For Scrap Vehicles: How To Get One? . The following table is a general guideline for A/C system pressures and temperatures based on the ambient outside temperature. You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. If there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator. Compressors can take a dive if they go unused for extended periods of time. You cannot repair a broken blower motor, the part must be replaced with a new one. If the system works but only for a short time, again, you have a leak that you need to locate and repair. The blend door actuator may require recalibration after replacement. Or, it may cause the compressor to run continuously and freeze up the evaporator coil resulting in poor cooling and reduced airflow. Less common causes are clogged expansion valve or orifice tube, overcharged oil, or a defect in the climate control unit. 2000 Mercedes-Benz E320 167,000 mi, Close. It was blowing cold, wife turned the car off & went into the store . Faulty AC Compressor. 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. "publisher": { Dirty evaporator can also cause GLE AC to blow hot air. Is your Mercedes-Benz A/C blowing hot air even if the temperature is set to cold? Check all the relevant fuses and relays related to the air-conditioning system in your GLS. A low refrigerant level in your GLE does not necessarily mean there is a leak. Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. This might be of help in the future. 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. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. Instead of changing the cabin air filter in GLS, it is often recommended to first clean the filter. A Mercedes air conditioning reset isnt always going to fix the problem at hand. . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a freon. If you can't get cold air in the cabin, the compressor might have failed. Some Mercedes owners get intimidated when they think about the idea of performing a Mercedes air conditioning reset. Therefore, it is recommended to do this in a workshop. A cycling switch may be bad, a fuse may be blown, and the system may not have enough refrigerant pressure to trip the low-pressure cutoff switch that cycles the compressor. 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. If the clutch engages and disengages rapidly, the refrigerant may be low. The following is a general A/C system troubleshooting guide. Most cars are designed to have the radiator cooling fan kick in when the A/C is on. Set the cooling fans on high climate control. Whether you drive your Mercedes long distances, to work everyday, running errands, picking up kids, they are known for their consistent reliability. 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. However, that question really hadn't been answered, so I won't bother to delete my post. 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. 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. The dye check will not work if the system is too low and the compressor is not cycling. Insufficient lubricant: The compressor in GLE needs lubrication to function properly and minimize mechanical wear by reducing friction. Mercedes Benz ac blowing hot air - What you do now? 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. May 23, 2014. 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. After you have your key in the second position in your ignition cylinder, you can then move on to focusing on the buttons that are used for recirculating air and defrosting in your car. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. Mercedes-Benz Maybach S580 AC Condenser Cost . "mainEntityOfPage":{ Youll also need to prepare to pay whatever its going to cost to fix your AC system. But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. 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. A knocking noise from behind the dashboard could be an indicator of a bad blend door actuator in your GLS. Leaks are the most common problem associated with the air conditioning system. The A/C system is designed to disengage the A/C if the pressure in the lines is too low. In rare cases, a fault in the climate control unit can cause the AC to stop cooling. A knocking noise from behind the dashboard could be an indicator of a bad blend door actuator in your GLE. 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. You could be looking at paying. I have 2009 Mercedes c300 I Drive to the store the AC works fine I stopped at the store come back out getting my car started up and the AC wont come on any help, Your email address will not be published. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I have a 2000 S430. You have a minor leak if the system works for a few months. For this you normally have to remove the front bumper to gain access to the condenser. Put pressure into a fluid you will increase its temperature. . As you charge the system, you may notice the A/C starts to work. 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 two ports in the air conditioning system of GLS. 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. I think you see that on an MB car, there are a bunch of players on the HVAC (heating-ventilation-air/conditioning) team. Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. "dateModified": "2017-07-13", But since its the most easiest thing to check, you should definitely start by inspecting the condition of the filter when troubleshooting the AC. How soon you should get it serviced . 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. Compressors switch on and then off very quickly. and well respond with an offer almost on the spot. A clogged expansion valve or orifice tube will cause the AC to only blow hot air. Top Junk Car Removal Services In Chicago: FREE Vehicle Disposal. I usually notice, but didn't. "logo": { In rare cases, a manufacturing defect can also cause a compressor failure. If you are only topping off the refrigerant in your Mercedes-Benz GLE 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. The read more Mercedes-Benz 600SL AC Condenser Cost . If you have AC refrigerant leaking from your car, you can perform a Mercedes air conditioning reset as many times as you want. 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. Questions / Mercedes-Benz / C230 / 2005 / AC blowing hot air; AC blowing hot air. Its not going to do you much good! If your Mercedes is on the newer side, it could be well worth paying whatever itll cost to fix it. Hopefully, your system was low, and it is working again. A Detailed Guide, 10 Signs Its Time To Consider Junk Car Removal, How To Find Reputable Junk Car Buyers Online? 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. Once youve done this, you can let the buttons go. If the refrigerant level goes down again quickly, it means there is probably a leak. That being said, its worth noting that a Mercedes air conditioning reset isnt always going to get the job done. Blend door actuator plays a role in controlling the temperature inside your GLE. Your Mercedes air conditioning reset should be complete, and your AC system should be working in the way that its supposed to again! How the A/C System Works. Gather the right tools. It is also cryogenic and can cause severe frostbite when it comes in contact with the skin. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). 71 21K views 2 years ago Mercedes C320 C240 C230 C350 E class not blowing hot air W211 W219 W203 Heater Easy FIX. Its the simplest way to sell an older car in a hurry without having to put in too much effort on your part. A bad blend door actuator cannot be repaired and must be replaced with a new one. }, The Best in Auto Repair. The blend door actuator may require recalibration after replacement. 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. 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. The leak can be diagnosed by injecting small amount of fluorescent dye into the AC system. 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 GLS. Just like with low refrigerant, the AC in GLS will blow warm air only if the AC system is overcharged with refrigerant. Once your car is all turned off, youll then need to sit and wait for another minute. Find the A/C fuse and make sure that it is not blown. SOURCE: Air conditioner blows hot on one side 1999 mercedes e320. 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. 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. The leak can be diagnosed by injecting small amount of fluorescent dye into the AC system. Once you have the key for your Mercedes in the second position in your ignition cylinder, you can then remove your hand from it so that you dont accidentally turn it any further. 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. AC not working, blows hot air on Mercedes S 430, S500, S600 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. There is also a high-pressure service port. So in the expansion unit, the refrigerant temperatures drop below the outside temperature. following a recharge. A professional mechanic can swiftly diagnose the poor AC cooling issue for you. 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. Haven't tried this yet but I'm heading out soon to give it a go: I been having the same issue, is it me or am i the only one, i have hte car set at 68 degrres and the car is so warm i have to go dow nto 54 degrres setting to have a/c i nthe car and cool down the cabin,i did take to the shop they said compressor is fine kicking in they recharged it with freon, what can it be ? To get around this issue, you can turn on the defroster, which automatically uses the AC component. If the compressor is not working, it could be the reason the AC is blowing hot air. Mercedes Benz Air Conditioning Reset Mercedes Benz Evaporator. Cleaning the evaporator in GLE is not a simple task. Next, check the clutch itself. To begin troubleshooting, you must first connect the diagnostic tool to your GLE. The low-temperature refrigerant passes through the evaporator, which causes the evaporator to get cold. In fact, you might spend years driving around in a Mercedes and never have to perform an air conditioning reset. So I bought a new sensor and installed it. Your vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. How to replace an AC condenser. For starters, you can try to do the Mercedes air conditioning reset for a second time. Replace AC compressor for MERCEDES-BENZ SL (R107) in case of defects or service life expiry. . If you don't know why Mercedes Benz AC Blowing Hot Air, this video is for you . The pressure values based on ambient temperatures differ depending on the type of the refrigerant. The evaporator works similarly to the radiator, except in this case, instead of hot coolant, there is cold refrigerant flowing through the evaporator. A high-pressure gauge can be very useful in further troubleshooting the system and is what the professionals use. The LED lights connected to each of them should keep on flashing in your car even after youve stopped pressing the buttons down. Learn how to fix the problem by recharging the A/C system of your Mercedes-Benz with a refrigerant. Excessive oil can also reduce the performance of the compressor and can cause it to fail prematurely. Due to the complexity of the replacement job, it is not recommended as a DIY project. 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. If the pressure is higher than the recommended pressure, let some refrigerant out preferably into a rag to avoid exposure. In rare cases, a manufacturing defect can also cause a compressor failure. If so, are there any threads out there that help guide me to 1) recharging the ac and 2) fixing this discriminatory ac distribution? Asked by Trail1a in Phoenix, AZ on . Turn on the AC and set it to the coldest setting, and the fan speed to maximum. "width": 243, You should then turn your car off completely. An overcharged system not only affects cooling performance but can also damage the compressor and sometimes can cause a major leak. This will let you know that youve held the buttons down for a long enough period of time. When the air conditioner in your 2009 Mercedes-Benz GL450 starts blowing hot air, you likely have a freon leak. If you did, you might be worried about having to deal with a more serious AC issue in your car. Just have it refilled and you can drive with pleasant temperatures again. Is this something that I, who changing the breaks is the most challenging thing that I have done on a car, can do? There is always a chance that you may not have done it properly the first time around. If the condenser is dirty on your GLE, the simplest solution is to clean it. Excessive oil can also reduce the performance of the compressor and can cause it to fail prematurely. If the compressor fails, the AC will only blow hot air. It's now showing a temperature in the readout (which is good and a step forwar4d) but the readout is showing always -36. Check the AC compressor. How To Sell My Unwanted Car For Top Dollar? Working on your Mercedes Benz's aircon system is time-consuming but not . You might want to think twice when making expensive repairs to the AC system in a Mercedes. If the system is low, then start recharging the system using the instructions that came with your recharge kit. So, even if you recharged your GLS AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. A dirty filter causes the overall ventilation of the interior to deteriorate resulting in reduced cooling and air flow. 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. Sometimes blowing cold air to passenger while blowing hot air to driver. The OBDII connector is usually located under the dashboard. 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 In rare cases, a fault in the climate control unit can cause the AC to stop cooling. "@type": "Person", Youre then going to need to turn the key just slightly to the second position in your ignition cylinder. One of the key components of the A/C system is the compressor. 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