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02-09-2010, 06:20 PM
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#1 |
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Registered User
Join Date: Jan 2010
Location: Laurens sc
Posts: 11
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Heater problems
I have a 85 GMC i get no heat from the defroster just blows cold air! can someone tell me where to start.
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02-09-2010, 07:08 PM
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#2 |
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Registered User
 Join Date: Nov 2009
Location: Yonkers, NY
Posts: 276
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Re: Heater problems
Check Coolant level, thermostat, heater core, heater door
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02-09-2010, 07:51 PM
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#3 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,277
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Re: Heater problems
i posted pictures a couple of weeks ago in another thread similar to this with the location of the heater door and the cable if it turns out to be the problem
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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02-10-2010, 02:30 AM
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#4 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Heater problems
Check this clip and the cable above it
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 02-10-2010 at 02:33 AM. |
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02-10-2010, 03:16 AM
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#5 |
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Registered User
Join Date: Jan 2010
Location: Laurens sc
Posts: 11
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Re: Heater problems
Thanks to everyone and the pic!! I will start on it tomorrow. I will let everyone know how it goes.
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02-10-2010, 11:11 AM
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#6 |
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Registered User
Join Date: Dec 2009
Location: Winston, Ga.
Posts: 240
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Re: Heater problems
I replaced two thermostats in a 4.3l V6 due to heat probs, didn't fix a thing. Repaired the broken cable end and heat would run you out!!!!!
__________________
 In God We trust!!!
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02-10-2010, 11:12 AM
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#7 |
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One shot, one kill.
Join Date: Dec 2007
Location: Saratoga Springs NY
Posts: 859
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Re: Heater problems
Attack this issue 1 step at a time. Check coolant level. Next run engine for 20 minutes and feel upper rad hose, should be HOT. If not, change thermostat & recheck. (coil spring end towards eng, no spring end towards rad) Next feel heater hoses. If one is cold and the other hot, heater core is plugged. Try flushing it out. If that don't work, replace it. Lastly, check door operation. Hope this helps, Jim
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1984 K20 350M engine with 465,000 miles. Well, it's finally done!! Almost 2 years of work, but it was really worth the effort. Little stuff left to do is mount winch, wet sand & buff out and build belly pan\running boards. Body work takes lots and LOTS of beer!!!! God, Guts and Guns made America and God, Guts and Guns will preserve it! The worst thing you could do is get into my sights, but that don't matter, you'll never know it, cause you'll never hear the shot Jim or Paladin whichever you choose.
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02-11-2010, 01:49 AM
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#8 |
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Registered User
Join Date: Apr 2009
Location: Reedley Ca
Posts: 360
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Re: Heater problems
So how did it go you get it fixed O and Thanks OLD RUSTY you helped me out the other day on that other thread you were talking about my computer thing above the heater was blocking it from giving me heat (who knows how long it was that way the po said it was years since the heat work) sa again tons of thanks o and my wife thanks you too
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"There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die." |
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