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05-29-2014, 04:02 PM
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#1 |
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Registered User
 Join Date: Jun 2011
Location: chillicothe mo
Posts: 225
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heater out of wack
I think my heater controls are out of adjustment. this thing keeps cranking out hot air no matter where the controls are at. any ideas? not sure on what position the cables need to be in in relationship to the placement on the controls.
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05-29-2014, 10:42 PM
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#2 |
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Senior Member
 
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,867
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Re: heater out of wack
Heater only, or do you have factory air?
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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05-30-2014, 12:29 AM
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#3 | |
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Registered User
Join Date: Jul 2012
Location: Campbell, CA
Posts: 452
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Re: heater out of wack
Quote:
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1971 C/10 - Orange & White 2009 GMC 1500 - Lowered 3/4 22' KMC Slides |
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05-30-2014, 03:49 PM
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#4 |
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Registered User
Join Date: Jun 2011
Location: chillicothe mo
Posts: 225
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Re: heater out of wack
factory air
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05-30-2014, 04:13 PM
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#5 |
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Senior Member
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,867
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Re: heater out of wack
On the right inner fender, there is a valve in the heater hose with a little vacuum line running to it. When you turn on the AC the vacuum from the control panel closes the flow of hot water.
I would first pull vacuum on the valve. If it holds, you are losing vacuum somewhere between the control panel and the valve. You will have to pull the glove box, and check the vacuum line behind it.
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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05-30-2014, 04:15 PM
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#6 |
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Senior Member
Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,867
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Re: heater out of wack
__________________
other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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05-30-2014, 09:33 PM
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#7 |
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Registered User
Join Date: Jun 2011
Location: chillicothe mo
Posts: 225
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Re: heater out of wack
thanks a bunch. now I have a place to start looking for problems
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05-30-2014, 09:44 PM
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#8 |
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Registered User
 
Join Date: Apr 2013
Location: Gainesville, TEXAS
Posts: 658
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Re: heater out of wack
Don't rule out the mixing door between the evaporator and the heater core. It could be a cable issue or leaves and dead mice preventing it from operating correctly.
__________________
1972 Chevrolet Cheyenne LB 1/2 ton finished restoration/rebuild 1995 350 throttle body FI, 4L6E (running on modified GM wiring harness) 3.08 posi rearend, factory A/C on 134A, p/s, p/b, late 70's power windows and locks and cruise, speakers in the dash + 6x9's behind the seat, factory tilt, 40 gallon fuel tank in the bed with integrated tool box, air assist bags on the rearend, sway bar up front and much more. 1972 chevrolet SNB finished 2002, 350 TB FI, TH400, factory A/C, p/b, p/s, (FOR SALE) 1969 Chevrolet 1 ton in work, home made PTO dump bed extended frame, 350 CI , 1972 Chevrolet 3/4 ton suburban future project 1972 Chevrolet 3/4 ton p/u maybe a project one day 1966 Toyota Landcruiser my playtoy |
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