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Re: AC compressor will not engage via dash controls
Posted to HVAC Forum on 5/29/2019 3 Replies

Paul, is the A/C request signal at the PCM? May be able to monitor with scan tool. When you command the compressor on you are by-passing the HVAC module. Another thing you can do is place a resistor across the ambient temp sensor installing a reading near shop... Login to read more.

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