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Re: AC compressor will not engage via dash controls
Posted to HVAC Forum on 5/30/2019

Hi Paul, There used to be a pid on the scan tool in functional tests to reset or "update" the OAT. I can't remember if it is the PCM, BCM, or HVAC though. That used to work when we did a/c work on cold days when we brought cars in from outside, fixed something... Login to read more.