Jetta A/C

New compressor. Now it freezes up. Tried various amounts of Freon.

TIA, Tom

Reply to
Jay Mott
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It's broken... and we can't suggest ideas with out more info. Lets see, the jetta been made for just around 20 years!

Reply to
Lost In Space/Woodchuck

Sorry - 2000, 2L., gas, not automatic A/C.

Reply to
Jay Mott

Typically split-system AC units (and that is what is in a car, after all) freeze up due to high head pressure. Typically high head pressure is due to low freon, as the system is pumping gas under much higher pressure than it would liquid. Could also be valve issues, clogged condensate drain in the evaporator, a filthy evaporator, and myriad other things. Oh, and when you purged the system prior to installing the new compressor did you change the receiver/dryer? Add the correct amount of compressor oil compatible with that refrigerant?

So, in order to start your diagnosis in any meaningful way you need a set of gauges. Add (or remove) freon until the gauges read in the correct range for that refrigerant in that system. You will be surprised at how much refrigerant you might need to add.

Then, get to the evaporator and check its state.

Peter Wieck Wyncote, PA

Reply to
pfjw

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