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Old 01-08-2023, 07:12 PM   #11
Keith Seymore
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Join Date: May 2009
Location: Motor City
Posts: 9,167
Re: Help with HVAC issue

Awright - after much diagnosis I replaced the bottom (passenger side) mode door actuator.

I have successfully gone from "heat only/driver's side vents only" to no heat at all. So I put it back the way it was.

Maybe I'm not understanding this correctly -

The passenger side door is for temperature? (flips from hot to cold)

And the driver's side (above and inboard of the throttle pedal) is for defrost/vent and floor?

What controls the split between driver side and passenger side?

By way of reminder the truck is RPO CJ2 "Auto HVAC".

K
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