Re: R12 manifold pressure readings
Usually, with R12, pressure of 32 PSIG will usually give 35įF from the vent on low speed fan and on MAX or recirculate inside air.
Run engine at 2000-2500 RPM during check. There is an R12 temp vs. pressure chart out there.
The better gauge/manifold set will have a temp chart on low pressure gauge.
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