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Strange high side pressure reading
Posted: Mon Aug 23, 2021 2:22 pm
by canadmin
1999 GMC Sonoma 4.3. AC is now working great and the low side reading is good but I'm getting 0 psi on the high side. Its not the gauges or the lines cause I was using them yesterday and they were fine. Everything else is good. ??? Can anyone explain this?
Re: Strange high side pressure reading
Posted: Mon Aug 23, 2021 3:43 pm
by Cusser
I say your connector is not pressing/opening the high side service valve.
Is there a shut off valve on your high side connector? If so, is that shut?
Re: Strange high side pressure reading
Posted: Mon Aug 23, 2021 5:00 pm
by tbirdtbird
What he said
Re: Strange high side pressure reading
Posted: Mon Aug 23, 2021 7:45 pm
by canadmin
Thanks for the replies. I will check that out.