AC Compressor questions, please help! -
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post #1 of 1 Old 05-22-2020, 10:13 AM Thread Starter
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AC Compressor questions, please help!

I have installed a new ac system in my 2003 Jeep Liberty 3.7

New accumulator, new condenser, new compressor, all with correct measured amounts of PAG46, and also a new liquid line with orifice tube, and all new gaskets and o-rings on every connection.

Pulled a vacuum and checked for leaking psi, then pulled a vacuum before introducing R134a.

I put about 3 oz of pag46 into the compressor and I hand cranked it about 30 times before I added r134 or plugged in power...

What I am getting here is the same issue I started with... The compressor kicks on and off for 5 seconds at a time, over and over...

The pressure on low side goes from 40-45, compressor kicks on, takes it down to 20-25, then turns off... over and over...

Before all the part swapping, the high side was just matching the low side, but now it seems to go up to 75+ psi when compressor is on...

Anyone know if this could be the high pressure switch or something? Or a problem with the evaporator? (The only major component I didn't replace) Keep in mind the 2003 liberty doesn't have an expansion valve in the evaporator)

Last edited by CWBenjamin; 05-22-2020 at 12:10 PM.
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