If an ac system has not been properly vacuumed. how will it affect the high and low pressure readings?
Thanks
Air is a non condensable gas, excessive high pressures, no heat removal, no cooling.
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I've done those studies on a V-5 system (variable sroke pump) with small amounts of air it will artificially raise the suction pressure enough to cause evap freeze-up because pump does not destroke at correct pressure- with no vacuum pulled it will cause high pressure cut-outs and no cooling.
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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......
Also damage to the compressor....
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Chick
Email: Chick
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Freedoms just another word for nothing left to lose
Thank you very much for your replies.
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