The A/C in my 2.0 2000 jetta was the coldest car I ever owned I used to get 37 to 38 degree vent temps but My A/C went warm on me about a month ago one day. I took it to one place and they replaced the Expansion Valve which did not fix the problem, I was upset that they misdiagnosed it so I went to another place, they said the compressor was bad and replaced the Compressor with a aftermarket Sigma JP Compressor and replaced the Accumulator checked for leaks, flushed and re-charged the system. It is blowing cold but the coldest temps I get now is about 45 or 46 range on recirculate.
My question is can one compressor be colder than another and could it be that the amount of freon is off a little. I would love to get it back to as cold as it used to be. I took it back to the place that replaced the compressor and they said it is all working to specs. Any opinion would be great