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V7 control valve question

jwillets on Tue July 27, 2010 12:13 PM User is offline

Year: 2003
Make: Chev
Model: S-10
Engine Size: 2.2 L
Refrigerant Type: 134a
Ambient Temp: 105
Pressure Low: 120
Pressure High: 145
Country of Origin: United States

I suspect the control valve in my V7 compressor is malfunctioning. I have recovered, evacuated, and measured in the charge, and the compressor does not develop much differential pressure. There are no noises or other abnormalities, and no debris or contaminants were found in the orifice tube.

How can I find the correct operating point (seating pressure) for the control valve? Where can I purchase this valve?
Compressor is a Delphi 7023 (15765204)

GM Tech on Tue July 27, 2010 1:54 PM User is offline

its an A/C Delco part- so any GM or A/C Delco supplier can get it

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......

iceman2555 on Tue July 27, 2010 6:17 PM User is offlineView users profile

Do not allow the amount of debris located in an orifice tube to be a valid test for possible compressor internal damage. The condenser utilized on many late model vehicles has become the primary filtration media for the system. We have seen vehicles with totally destroyed compressors...locked up...clutch burned...and the orifice was clean. The debris captured in the inlet of the condenser.
Also, from the posted pressures, it is doubtful that the control valve is the problem. There is a test for control valve issues...why not perform this prior to purchasing this part. Wonder how many control valves are returned as being defective....when the issue was the compressor....and after purchasing a new compressor....well the newly purchased control valve is now to be returned.

The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

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