Compressor high pressure doesn't increase

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jsinga0596
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Joined: Wed May 31, 2023 3:04 pm

Compressor high pressure doesn't increase

Post by jsinga0596 »

2003 GMC Envoy XT w/rear air CCOT fixed displacement sanden TRAS12. Static pressure @ 100psi 85F temp outside.
compressor engages, anything over idle low side pulls down until low pressure switch shuts it off. High side stays @ 100psi and doesn't increase. at idle low side will hang @35psi high side @100psi. Vent temps are cool not freezing.
Compressor is not noisy. I doesn't have a variable displacement valve.
1st thing to do is evacuate and try and charge correctly?
Thanks, JS
tbirdtbird
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Re: Compressor high pressure doesn't increase

Post by tbirdtbird »

1st thing to do is evacuate and try and charge correctly?

YES
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