defroster problem
Thread Starter
Heel & Toe
Joined: Aug 2002
Posts: 19
Likes: 0
From: Kent Wa
defroster problem
I am not getting any forced air throught the defrost vent -even with full fan. I have not yet torn into the consule or dash to trace the problem. The fan seems to work on other settings but I seem to get air only from the floor vents. Can someone offer advice on the most likely source of the problem?
Thanks!
Kim Nicholas
Seattle
Thanks!
Kim Nicholas
Seattle
Drifting
Joined: Aug 2002
Posts: 1,339
Likes: 0
From: Hampton Georgia
Re: defroster problem (KNicholas2)
Try replacing that piece , when I was trying to troubleshoot this problem everyone told me this was a common problem with these units because GM had just started making them vacuum operated.
Race Director
Joined: Jul 2002
Posts: 13,858
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From: A 12/8 man in a 4/4 world
Re: defroster problem (KNicholas2)
i have the same problem with my 79. i have vacuum at the switch. when i apply vaccum to the different actuators they all work properly. so im assuming its the vacuum switch. you can bubba it by attaching a vacuum hose to the defrost actuator then connecting that hose to a hand vacuum pump tester then apply vacuum. that might be how i get thru the winter. havent priced the cost of the switch. just finished trouble shooting this afternoon.
