Quote:
Originally Posted by b454rat
There is a door in there that controls air flow. Not sure how it works or where it is. Guess I've been lucky with the pre-95s that the heat works lol.
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called actuator flap controls all 3 modes in vent, sometimes the mechanism sticks ,some wd40 does the trick.
like someone mentioned heater core could be plugged up, or a hose but that in return would over heat your truck as well.