Phil Manro

Thanks to Tyler in Derry, NH for the use of his VAG!

As I have posted before in the B5 forum, my A/C turns off after about 20 mins. and won't come back on until the car is completely cool (this is not a temp sensor issue, it has already been replaced).

Here is the VAG readout:

VAG-COM Version: Release 409.1-S

Control Module Part Number: 8D0 820 043 H
Component and/or Version: A4-KLIMAVOLLAUTOMAT_D65
Software Coding: 00062
Work Shop Code: WSC 06322
1 Fault Found:
01270 - A/C Magnetic Clutch (N25)
36-10 - Open Circuit - Intermittent

...Anyone have a clue of what this means???

Thanks!

Phil

gb944

Looks like the winding on the clutch may be opening up when it gets hot.

Phil Manro

Yes, I am betting that it is the clutch. Now the compressor is repeatedly engaging and disengaging.

How much $$ for a clutch?

Phil

gb944

a couple of hundred dollars...

SeeksAR

I don't have an Audi AC system schematic in front of me. But maybe there is a pressure sensor that is reporting that there is no refrigerant in the system.

Just a thought. This is exactly how my Jeep Grand Cherokee would tell me to please kindly add a pound of R134a. I know you are thinking, "What does a Jeep have to do with an Audi?!!"

The AC clutch is enabled by a relay when you ask for cold air. A sensor determines there's not enough pressure in the AC system, so ze KlimateKontroler kills the relay to the clutch periodically to save the compressor. Then ze KlimateKontroler system re-enables the clutch every few minutes to check if you dumped some refridgerant in there. Finding none, it disables the clutch and waits some more.

Heidiconnolly

You sure its the AC clutch?!