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Re: HVAC goes hot when driving
Posted to HVAC Forum on 2/26/2020 1 Reply

Since the PWM ground is an output you would measure at the valve first and backtrack to the controller if it is not present. I wrote earlier that at max A/C the PWM signal should measure less than 1V with a powerprobe. The attached picture shows how the powerp... Login to read more.

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