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Re: Reading A/C gauge
The truck a 72, has factory ac. about 18 months ago I had the system apart and flushed the lines, evaporator and condenser with a/c flush. Installed new compressor and dryer. vacuumed and charged. I had no bubbles in the sight glass. It cooled to 48. Lately it has not been cooling good, no bubbles. I put the gauges on it and was surprised to see over 70 on the low side. I did some research and thought the compressor was going bad. So I put another new one on and dryer. I have tried a new expansion valve with the same results as the original one. Do you guys think that the poa valve would cause such a high low pressure reading?
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