71 Green Olds
Old(s) Fart
Joined: Mar 2007
Posts: 50,539
From: Northern VA
Unfortunately, the mind reading thing STILL isn't working, so perhaps you could share what model, does it have A/C or not, Comfortron or not, etc. Diagnosis will depend on what you have.
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Joined: May 2012
Posts: 5
From: IL
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Joined: Jun 2009
Posts: 15,116
From: southeastern Michigan
He TOLD you right there in the title of the thread that it was a '71 and that it was green. What more do you need?
Man, you're picky!
Old(s) Fart
Joined: Mar 2007
Posts: 50,539
From: Northern VA
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Joined: Apr 2008
Posts: 2,810
From: Long Island, NY
Check the heater control valve. Loop the hose around TEMPORARILY so the heating system is disconnected and see if that corrects it. If it does that rules out it being engine heat that is entering the cabin.
Old(s) Fart
Joined: Mar 2007
Posts: 50,539
From: Northern VA
The flapper doors in the HVAC distribution box under the dash are vacuum operated. If the vacuum source hose is not connected properly to the engine, or if the hoses under the dash are disconnected, or if one of the vacuum diaphragm acutators has failed, the system will not work properly.
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vistacruiser67
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Nov 22, 2012 06:01 PM
