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**mikey531** · 04-04-2021, 07:57 PM

I am confused as to why my A/C compressor in my 69 GMC comes on when I switch to defrost and works great ! When I move the lever back to the left the compressor shuts off. What am I missing? Thanks !

04-04-2021, 07:57 PM	#1
mikey531 Senior Member Join Date: Jul 2009 Location: Exeter, NH Posts: 786	Vintage air Cold out defrost hot out dash vents. I am confused as to why my A/C compressor in my 69 GMC comes on when I switch to defrost and works great ! When I move the lever back to the left the compressor shuts off. What am I missing? Thanks !