Hello,

 

I recently sold my MK1 Fabia VRS and bought a 2006 VW Passat 2.0T FSI (this is the same engine that is in the MK2 Octavia VRS, hence why I've posted in this section), and my air-conditioning is not blowing very cold at all.

 

We all know of the compressor problems associated with VWs/Audis/Skodas etc around 2005-2007, and it is most likely a failed compressor, but I'm just looking for some solid advice on the matter.

 

These are the figures I get from VCDS of the compressor with the engine at idle and under load:

 

Idle:

 

 

Under load:

 

 

I'm not entirely sure how to read those figures, but it seems that the compressor isn't building up any pressure?

 

If the compressor is knackered, then I know that the procedure is to replace compressor, evaporator, dryer etc and have the system flushed and re-gassed, but would it be possible to simply replace the compressor and flush/re-gas the system without those other things? I've been offered a cheap, working compressor and I would like to try and keep it as cheap a fix as possible.

 

Thanks in advance.

Hi,

I think you'd be able to get more useful info by comparing the readings at idle with the aircon switched off and on, and also by varying the temp control settings on the dash and each time seeing if the coolant pressure and compressor load readings change correspondingly. Revving the engine doesn't really prove anything, as aircon systems are designed to reduce power or even shut down under high engine revs to protect themselves from damage.

It may be that the system is just a bit low on refrigerant.