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03-25-2008, 01:56 PM
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#1 |
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Registered User
Join Date: Apr 2006
Location: southern Il
Posts: 335
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heat blowing cold
boy am I glad the temps are up here in S IL
all of a sudden my heat is blowing cold any ideas |
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03-25-2008, 02:37 PM
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#2 |
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Registered User
Join Date: Sep 2006
Location: SE Virginia
Posts: 158
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Re: heat blowing cold
Here are some ideas:
Heater core blocked, this could be internal or external Fan motor not working, fan broken Thermostat stuck open Heater control valve closed Cab duct work not in proper position
__________________
trailers are for boats |
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03-25-2008, 02:39 PM
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#3 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: heat blowing cold
Low on coolant?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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03-25-2008, 03:50 PM
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#4 |
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Registered User
 
Join Date: Jan 2007
Location: Columbus, Ohio
Posts: 4,348
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Re: heat blowing cold
Just a guess, but there could be leaves, pine needles, rodents, etc. living in your heater box...
Mine works well enough in my beater, but I will be taking the cowl off - cleaning that stuff out (putting a fiberglass screen under the cowl opening) and putting it back on... Then I will be removing the box under the hood and making sure that everything is clear (no junk in there) and then giving it another run... I have been told that the heaters in these trucks sometimes work too well... When I turn on my blower in the cab - I get an assortment of leaves, etc. that comes out of the ductwork (top of the dash and below) so I know that there is stuff in there...just hasn't been warm (and dry enough) to do it yet. The other options are also valid. Good luck. |
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03-26-2008, 03:10 PM
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#5 |
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Registered User
Join Date: Apr 2006
Location: southern Il
Posts: 335
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Re: heat blowing cold
thanks guys for the quick replies
all of a sudden the heat started to work yesterday I am going to check the coolant level today and the cowl |
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