Take the 2-minute tour ×
Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It's 100% free, no registration required.

The climate control was nuts all the time since I bought the car few years ago. I have the air conditioning liquid filled. The mechanics said, the pipes are all in good shape, but something is wrong, go check elsewhere, like electrics or stuff.

I checked the pipe leading to the interior, it is really cool, on the side where the glove box is. When you press the (*) snowflake on the climate control you can hear and feel the compressor kick in.

But the thing is, you can only feel a tiny little bit cooler air coming out when you set the temp at higher than 25-26°C. Seems like if the air is not mixing properly or something. If you set it lower temp or "LOW" - get ready for the hellish hot airflow. It's like some sensor or similar kind of thing is messed up and I don't know what. It can even randomly switch from blowing cooler air to hot air and turning off the compressor. I kind of suspect my climate control unit to be the culprit, but I'm no auto or electronics specialist. How can I troubleshoot? what steps can I take? what should I check?

Update

By the way I checked and re-soldered the joints shown in this article. These were causing some issues for me too.

share|improve this question
1  
I would suggest the issue is either the blend door actuator or the controller itself. I don't know how you can directly troubleshoot either of these. Maybe someone has an A4 Service manual and can lead a step-by-step for you to diagnose. –  Paulster2 Jul 9 at 12:50

1 Answer 1

An Audi scanner, VCDS from Ross-Tech.com, will show up any electronic faults on your AirCon. Time and time again though, the symptoms you describe can be put down to the AirCon thermostat.

share|improve this answer
    
Yeah, I'll have to take a look at the thermostat. Only if I knew where it is –  Ashtray Jul 11 at 12:38
    
If I said AirCon thermostat around the workshop they know that I mean 'AirCon Resistor Pack'. It acts as a thermostst. –  Allan Osborne Jul 12 at 13:04

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.