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Old 07-09-2015, 06:32 PM
yuke yuke is offline
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Join Date: Jan 2009
Location: N.W. In.
Posts: 609
About 1 month ago I had constant heat coming out even on the coolest setting. I purchased an mtc monovalve put it in and still had the issue so I cleaned the screen on the old one put it back in an now no heat coming out. My A.C. is not working I roll down my window for that but at least I dont have heat coming out like before. You could also try pinching off your hose running to heater core to verify if it is a bad monovalve. I really cant explain what made my old one work but it does and I'll leave it at that.
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