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A/c psi


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  • 2 weeks later...

Most Mack day cabs take 3 lbs refrigerant and sleeper cabs take 3.5 lbs. The binary switch should have cut out the compressor way before that pressure was reached on the high side. With a good operating system, the high side should be around 250-275 psi and low side below 30 psi.

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