Heater control

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  #1  
Old 01-08-05, 08:08 PM
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Join Date: Jan 2005
Location: usa
Posts: 27
Heater control

I have a 95 GMC jimmy and the heat and air blows from the defroster (at windshield) only checked heater control switch all vaccume lines are on and switch looks to be working any ideas thanks Herbie
 
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  #2  
Old 01-09-05, 04:42 AM
Join Date: Jun 2002
Location: Long Island, NY
Posts: 1,531
Check for vacuum at the control. The default position is defrost and hot when vacuum is lost.

Find the source on the engine and follow it back. Possible cracked/hose off.
 
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