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Originally Posted by brendon9
i have 90 psi on the low and high but the compressor will not engage.
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Just 90lbs on low side without compresser running does not tell us much.
To check for proper freon level you need to jump the compresser at relay or compresser do not jump at the 3 wire pressure switch {it is not a jumpable switch}and get a low and high side reading.
The pressure sensor will shut down air if freon is low or pressure is low or high.
To test the air cond system you will need a scanner.
it is computer controled.
I would get codes first and make sure it is full of freon.
I can send you a pdf on the test. BUT YOU WILL NEED A GOOD SCANNER TO RUN THEM.
If you want the 3 page long test in a pdf e mail me at
[email protected]
MT