Engine Size: 3.8
Refrigerant Type: R134a
Ambient Temp: 85F
Pressure Low: 90
Pressure High: 95
Country of Origin: United States
I am having problem charging the system. I did pull vacuum for 20min and I tried to charge it, but the system takes very little refrigerant (about 6oz). The pressure for Low and High side is about the same - 95psi. The compressor comes on - but the Low and High pressures stay the same. Do I have bad compressor or bad control valve?
I decided the recharge the system because I had similar condition Ã¢ÂÂ Low and High pressure were staying at 100psi.
As long as you are sure you have the gage set valves closed (at least the high side) when charging- then you have a bad control valve- if both valves are open- you have an external bypass going on through the gage set......
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
Thank you!! Ordering control valve right away after I figure out the color coding
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