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Heater Control Valve

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Old Apr 22, 2012 | 09:27 PM
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LastStarfighter's Avatar
LastStarfighter
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Heater Control Valve
What condition draws a vacuum on the hose that connects to the heater control valve. What settings?

Thanks!
 
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Old Nov 24, 2012 | 03:22 PM
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7622RM
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It is my understanding that a vacuum is applied to the valve (and the valve closed) when Max A/C is selected so that no hot coolant will flow through the heater core.
 
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