After all these years, I never knew the A/C would run during the winter, and that's the way it's supposed to work.
I have an odd ball thing where I am seeing the AC compressor kick on, yet I've disabled the A/C button in the truck!
But the vibration I've had made me look and I saw the clutch pull in and run.
I'm trying to determined if the AC should kick in, even when I've commanded it off at the front controls, when in DEFROST mode. When I hook up my scan tool - it does! The AC enables and cycles in DEFROST mode no matter what I do.
I actually pulled the fuse on the AC, as I think I have a poor performing heater core that needs to be descaled. The circulator pump does operate at high heat 90 DegF and High Fan Speed, but the discharge of the heater line is cold until I rev up the engine with the AC fuse pulled. Cold cold cold.
Because the AC is kicking on, and the heater is poor, it's friggin frigid in the car when I'm trying to warm it up!
I have things to check!