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Old 04-30-2016, 11:52 AM   #3
LockDoc
The Older Generation


 
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Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 26,089
Re: Shut off valve for heater core?

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If you have heat coming out of your vents with the levers in the off position then there is either a blockage (think mouse nest) keeping the heat diverter door from closing or the rubber seal around it is bad. The valve may be a fix for your current problem but I would think you will have other problems with your heater/defroster when you do need them, unless you fix the diverter door.

LockDoc
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