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F-100 heater problem

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Old Oct 1, 2004 | 02:37 PM
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F-100 heater problem
My heater is constantly giving off heat. I replaced the heater control valve, and checked the control cable positions;no difference. Would putting the control valve on the hose intake to the heater core instead of the discharge side make a difference?
 
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Old Oct 1, 2004 | 04:20 PM
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i thought it was supposed to be on the intake side because if not the heated water will go through the core and just stop when it hits the valve. maybe im wrong though??
 
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Old Oct 1, 2004 | 05:11 PM
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From: in the springs
yeah that valve is supposed to be on the other side,
 
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Old Oct 2, 2004 | 06:57 AM
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Bruce, Do ya got headers on your truck? They will make heat, as well as holes in the floor & firewall.

John
 
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Old Oct 2, 2004 | 12:13 PM
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No John, I do not have headers. The heat is coming from the heater. Thanks Bruce
 
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Old Oct 2, 2004 | 04:46 PM
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If the valve is really shut, the heater should not be producing heat.
 
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Old Oct 2, 2004 | 11:54 PM
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The valve is definitely closing, and still there is heat
 
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Old Oct 3, 2004 | 05:07 PM
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From: in the springs
why not try just bypassing the heater core and see if that fixes your problem? if it does i would move the valve to the inlet side of the heater and while its out make sure the valve is closing fully.
 
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