W204 air con reset

Would like to check if anybody have experiences similar to mine? My w is from the year and I've been experiencing air con issues such as when the car is parked stationary under sun for long hours 4 hours onwardsthe aircon will just blow hot air all the way until about minutes driving or idling. If the car is parked under shelter for long hours, it will take 5 minutes before the cold air comes in.

I've sent to cycle and carriage for diagnostic about 3 times now and they give me all sort of reasons like compressor fluid insufficient, just wondering anybody have a solution? W FL C Recently my aircon is not even blowing air out I remembered just seeing a mediacorp Ch8 show, how to faster lower your car interior temperature especially when park car outside under hot sun.

Thank you guys for replying!

w204 air con reset

Actually I've sent to Ubi for the first instance and they said they needed to updated the software doesnt workSecond time sent in for servicing and raised issue at leng kee, was told that couldnt find any issues, Third time sent in to leng kee again and was told my compressor fluid was below factory specs and they did a full diagnostic on my compressor and found no other issues. So being pissed that Singapore is already very warm and the air con is still blowing hot air, I brought the car to a independent workshop for opinion and was told that my compressor has pressure problems bringing the fluid to flow around the compressor after the engine has completely cool off.

I want to get this fix before my warranty ends hahaha. If the car is old, it could be sticky compressor clutch. As the evaporator is hot usually park a reasonable long time under the sun and you know is hot cos the air blowing out is quite hotintroducing cool air with the hot evaporator as such temperature extreme will cause material fatigue rapid cooling of the metal material. I have similar problem. At first air-con is blowing smelly air.

It only happened when the car just started and back to normal when car is moving for a while The other issue I had with the air-con is, it becomes warm when car is idling for 10 minutes or more The air-con stops functioning although engine is on Finally, brought it to a workshop.

They said compressor is not functioning properly and the seal had deteriorated to give a foul smell He didn't specify and I didn't asked. But I suspect must be related to the compressor change I have the W FLmade inand had this issue for damn long. So anyway, went to a renowned car workshop in Sin Ming and they did checks and said no issue. Valve and compressor was the issue for me. Took about 2 days since the workshop had the parts.

My problem became worst like when i don' t drive for more than one day, when i turn on the aircon, it does not work. Air con compressor replaced. So far ok! You can post now and register later.If you are going to be working on the system make sure you have the refrigerant properly evacuated and reused or disposed of. The compressor is not cheap so make sure to give your system a complete diagnostic before just replacing the compressor.

Begin by removing the front engine cover red arrow and two air ducts yellow arrows. Pease see our article on engine cover removal for additional assistance. Large Image Extra-Large Image.

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You will need to remove the under body engine trays to access the compressor red arrow ; please see our article on under tray removal for further instructions. Remove the drive belt by placing a 17mm socket on the tensioner and turning it counter clockwise until you can slip the belt off the motor red arrow.

Use care not to pinch your fingers between the belt and tensioner. There are three bolts that hold the compressor to the engine and its mounts. The two front bolts go into the mount at an upward angle red and yellow arrows. You will need to decide whether it is easier for you to remove the bolts working from above or below the compressor.

Note: a lot of components have been removed for photographic purpose only; you do NOT need to remove anything other than what is described in the article.

The lower mounting bolt can be accessed from below red arrow but there is not a lot of room between it and the sway bar, so you will have to take your time. The wiring clip sits on the compressor; use care when working with it as it can break very easily red arrow. Disconnect the wiring and slide the wiring back out from the compressor.

With the refrigerant properly and safely evacuated from the system you can use a T45 Torx and separate the two lines. Make sure to suction and properly cap the open lines. When installing the new compressor make sure to lubricate the new O-rings with compressor oil before installing.

Installation is the reverse of removal. Got more questions? Join us in our Technical Forum Message Board and ask a question to one of our many automotive experts.Your Mercedes vehicle will flash a host of service lights to inform you when something might be damaged inside the car.

If the air conditioner unit is not running normally or is only blowing out warm air, it may be a temporary fault. Be aware that if you reset the unit and it again stops working, you need to take the vehicle in to the dealership for repairs. Insert the key into the Mercedes ignition and turn the ignition cylinder to the "2" position.

This is as far as the cylinder will go without cranking the engine. Press and hold the defrost and recirculated air buttons simultaneously. The defrost button has three lines going through it, while the recirculated air button has a picture of a car with a curved line through it.

Hold these buttons down for about five to 10 seconds, or until the LED lights on both buttons start flashing. Wait 45 to 60 seconds for the LED lights to stop flashing. Then turn off the car. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.

Mercedes Air Conditioning Reset W204

To submit your questions or ideas, or to simply learn more about It Still Works, contact us. Step 1 Insert the key into the Mercedes ignition and turn the ignition cylinder to the "2" position. Step 2 Press and hold the defrost and recirculated air buttons simultaneously. Step 3 Wait 45 to 60 seconds for the LED lights to stop flashing.

Wait 60 seconds and then start the car engine again. About the Author This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.Log in or Sign up. Mercedes-Benz Owners' Forums.

This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More. Hi all I noticed that my w c is not blowin cold air when engaged. Whem engine id cold there is nice anf cold air.

When engine hot i get little warm air instead of stone cold. Sometimes i get hot blows and then warmy cold. I got new pollen filter. What could it be?

air con not blowing cold air

Clutch, sensor,low gas or maybe reseting climate controle will help? I have lowest,coldest temp selected and and as above occur. The uses one of those micky mouse motors used as a duo valve they can fail in the hot only position. Yes cityboy it is that one. So what do u think? Try to reset first? All buttons work. Go and try to regas to find out if air con is empty? I don't know if empty ac would matter with engine revs while idle. If the heater change over valve is working you will have cold air when you turn it down, if you turn it down and still hot then the valve is faulty.

EC is air con off It makes no difference to the air con at what rpm you have,it works at idle too, there is the re set procedure in the sticky post for your car. When air con is working the air will be icy cold,if you have a fault like low gas the cooling will still work but not be that cold, if out of gas the LED would come on and tell you. Alex CrowNov 14, Last edited: Nov 14, I had it regassed and only enjoyed cold blows for a while then I'm back on the hot blows.

Somebody help!! Check for leaks! FrontstepApr 8, Yes that should have been done when it was bring filled, should be left on to the machine to see if the pressure stayed up. Take it to an air con specialist to put dye in the system to check for leaks.

The major weak point is the condenser as this gets all the road crud and corrodes. You must log in or sign up to reply here.Forums New posts Search forums. Members Current visitors. Log in Register. Search titles only. Search Advanced search…. New posts. Search forums. Everywhere Threads This forum This thread. Log in.

Air Conditioning Compressor Replacement

Contact us. Close Menu. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Home Forums Technical Electronics. Faulty air con w Thread starter Ashmando Start date Jul 4, Tags air faulty w Ashmando New Member.

Hey guys. Wonder if you can help. So I decided to get it re gassed today at ATS. Can't fault the service. But the air con still doesn't work. Now the previous results off the testing machine showed I had gm out of the gm.

w204 air con reset

It showed no leaks and everything was in place and good working order. And the last time it was gassed was when brought in So I assume it can't have a leak, otherwise it'd be completely empty being 9 years old? So does anyone know why it's not working? The light comes on as it should, the blowers work fine and the car was diagnosticed to remove any faults and to re set the air con didn't showing anything and had the reset done. Also could it be a fuse?

Or condenser? Any help would be appreciated. Cheers Ash. Giantvanman MB Enthusiast. The system should be used regularly, even in winter just with the temperature set higher, of course to keep it in tip top working condition. If there have been long periods of inactivity combined with eight years between gas change, I would suggest you visit an independent MB repairer…it could be a whole host of things that would not necessarily throw up a fault code.

For future reference I will always use the air con now. I only brought the car 6 months ago so didn't have much control over the previous owners abuse to the car. I was hoping. Lyserman Active Member.One of the most common complaints of Mercedes users is issues with the air conditioning system.

In many models, the AC keeps blowing hot air even after recharging the coolant. It is a frustrating problem, especially during the summer, when it is almost impossible to drive a car without the AC on. A Mercedes air conditioning reset is a possible solution. Do you know how to do it?

Is there any other way to fix the glitch? All Mercedes cars have a series of service lights that there is something wrong with an internal component or system.

However, there might not be any damage in the AC unit when it is blowing warm air or not running properly.

w204 air con reset

It could be a temporary fault and a reset is likely to be enough to restore the normal function. Sometimes, the process is called a Mercedes climate control reset. The reset procedure is similar no matter whatever you call it. However, if the AC shows any trouble after resetting, you have to take it to a servicing shop or the dealership for a permanent fix. This is the highest point that the cylinder can go without activating the engine. Step 2 : Press the buttons for recirculating air and defrosting at the same time and hold them for somewhere between 5 to 10 seconds.

To be on the safe side, hold them until their LED lights start flashing. Step 3 : Wait for about a minute for the LED lights to stop flashing.

Mercedes W164 ML 350 problem with air condition buttons (Workaround) A2518707389

When they do, turn the car off. Wait one more minute before restarting the engine. The AC system is reset now and the hot air blowing problem is likely to be solved. If a Mercedes air condition reset does not work, these following reasons could be causing the trouble:. When the AC is releasing hot air, the possible reason could be a defect in the damper. The component is in charge of the air path that goes into the cabin.Log in or Sign up.

Mercedes-Benz Owners' Forums. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies.

Learn More. AC Reset? Mine blows hot air out of the driver side vent next to the window all the time. On my old Scorpio, there was a process for resetting the CC by holding in combinations of buttons on the control panel that made the system open and close flaps etc and make sure everything was aligned. Is the same possible on my car? I'd like to try that before I start looking at stuck flaps or broken actuators. Cheers, Bill. BillyBoyApr 24, Bill, I'm not sure on the w system, but this worked on my resetting the vents on my w - in the absence of other replies, it may or may not be of use: Press recirculated air and defrost buttons on control panel together for longer than 5 seconds.

The LED's in the defrost and recirculated air buttons flash alternately. Switch off ignition. After 40 sec re start engine. BillyBApr 25, That confused me - I thought I'd replied to my own post for a second when I saw the name!

By defrost button, do you mean the one that is supposed to rapidly clear the front windscreen? BillyBoyApr 25,


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