Compressor high pressure doesn't increase
Posted: Thu Jun 01, 2023 2:16 pm
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
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