AC problem
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AudiWorld Member
Joined: Oct 2003
Posts: 326
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From: Zurich
AC problem
Hi all, seems I have some issue with my AC. Can't really tell how long its been like this since yesterday was the first really hot day of the year. Also, the car has been sitting in the garage for the last 5 weeks but from what I recall it was cooling much better last time I used it.
There is some cooling but far from enough and it has to work on full fan all the time but still won't get to the set temp now that we have some 25-30C outside. Even when I set it to LO. Same for the rear unit.
I was thinking if some flap or whatever might have stuck during the 5w I didn't use the car but I'm not sure where to start looking. I VAG-COMed it but no error code.
I guess I could have the system checked but I'd rather not start with throwing money on that if someone who had a similar problem could chime in with ideas first.
There is some cooling but far from enough and it has to work on full fan all the time but still won't get to the set temp now that we have some 25-30C outside. Even when I set it to LO. Same for the rear unit.
I was thinking if some flap or whatever might have stuck during the 5w I didn't use the car but I'm not sure where to start looking. I VAG-COMed it but no error code.
I guess I could have the system checked but I'd rather not start with throwing money on that if someone who had a similar problem could chime in with ideas first.
AudiWorld Super User
Joined: Jan 2010
Posts: 2,218
Likes: 23
From: Michigan
Might just need the coolant to be recharged? Sounds like your getting the same airflow so if your getting the same airflow I doubt it is anything stuck closed. Probably just need to recharge your A/C system / add coolant etc. My 05 has very cold air even when I set it to be a 70 in the car, sometimes I have to turn it up to just be at 74 because it can get chilly. I always have the rear seats air off though to increase the airflow to the front because I rarely drive people in my back.
AudiWorld Super User
Joined: Aug 2002
Posts: 4,918
Likes: 7
From: Warwickshire
Have the refrigerant flushed and a new drying canister fitted.
The system will be filled with R-135a - or Triflouroethane - this will usually be drained off, then replaced with the same compound but containing a trace dye which contains a dye which shows under ultra-violet light as an aid to discovering leaks.
I would advise that a new drying canister is fitted - this is a can containing sylica gel crystals which absorb moisture form the gas to reduce the risk of corrosion and improve the efficiency of the liquid to gas ~ gas to liquid heat transfer process.
It may be that there is a leak but the tracer dye will aid finding the problem.
It does not sound like any other problem and I believe that if there was no pressure left in the system then the compressor will not cut in at all so it sounds like a slow leak which means you may not need to do anything to fix it until it starts to loose efficiency again.
The system will be filled with R-135a - or Triflouroethane - this will usually be drained off, then replaced with the same compound but containing a trace dye which contains a dye which shows under ultra-violet light as an aid to discovering leaks.
I would advise that a new drying canister is fitted - this is a can containing sylica gel crystals which absorb moisture form the gas to reduce the risk of corrosion and improve the efficiency of the liquid to gas ~ gas to liquid heat transfer process.
It may be that there is a leak but the tracer dye will aid finding the problem.
It does not sound like any other problem and I believe that if there was no pressure left in the system then the compressor will not cut in at all so it sounds like a slow leak which means you may not need to do anything to fix it until it starts to loose efficiency again.
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