Automotive Air Conditioning Information Forum (Archives)

ric7744 on Thu July 17, 2014 4:20 PM

Year: 2000
Make: Volkswagen
Model: Jetta
Engine Size: 2.0
Refrigerant Type: 134a

I had a Compressor failure on a 2000 Jetta 2.0. about 2 years ago. First shop I had it to put on a aftermarket compressor and aftermarket condenser replaced the dryer and aftermarket expansion valve and flushed the system. After this it still was not cooling anywhere near as good as it was, so after taking it to several places and having them check the refrigerant level and whatever else they could think of I had a shop replace the compressor again this time with a oem Sanden Compressor and also had the OEM expansion valve put on. The car is cooling better and more consistent than it was with the aftermarket parts but it is still not as cold as it was before the original failure 2 years ago. I was wondering what else could possibly be done to get it back to ice cold like it originally was?

TRB on Thu July 17, 2014 5:00 PM

Pressure readings at idle and 1500RPM with doors open mihgt help us see what's going on.

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ric7744 on Thu July 17, 2014 5:04 PM

I don't have the last pressures, My theory is that with all the changing of parts over the last two years and it only being flushed one time way back that there might not be the right amount of refrigerant to oil ratio in there and maybe I should get the system flushed and completely refilled with the right ratio along with replacing the receiver dryer again. What do you guys think?

Cussboy on Fri July 18, 2014 10:58 AM

Need to measure and post both high and low side pressures at about 2000 rpm after running the AC at least 5 minutes. Plus your ambient temperature.

Repeat with blowing air from a big fan over the front of the VW, then repeat using water mist sprayed in through the VW grille opening.

HECAT on Fri July 18, 2014 1:51 PM

Oil overcharge is a good guess.

As others have asked, pressures and a few simple tests will help eliminate a lot of guessing and get you dialed in with a consensus on the best course of action.

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