Quote:
Originally Posted by Boog
Have you checked the cowl air intake door to see if its working? It's been a long time since mine was on the road so memory is questionable on this. It is vacumn operated. That cowl door when closed will allow the fan to pull air from inside the cab to recirculate it thereby warming the cab better.
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I am not aware of any vacuum operated door. Doesn't mean I don't have one, but I have never looked for one.
I have also read that the fan should be multi speed. I have never tried the air fan control lever in different positions, only all the way right or all the way left.
Are either of those items factory installed on a non-ac truck?