nienberg.11 Posted April 27, 2007 Share Posted April 27, 2007 Guys, I just got my a/c working, but I'm noticing that even while the dash vents are blowing cold air, the defrost vents are trickling out hot air. Slightly counterproductive. Has anyone else dealt with this? I suspect that this either a vacuum issue or perhaps some foam seals in the dash have rotted out, but I'm not sure. Quote Link to comment Share on other sites More sharing options...
bjhines Posted April 27, 2007 Share Posted April 27, 2007 Your heater valve is not shutting off. The core is staying hot and the def vents are just where it happens to be comming from with the floor ducts closed. Quote Link to comment Share on other sites More sharing options...
nienberg.11 Posted April 27, 2007 Author Share Posted April 27, 2007 How is the heater valve actuated, and where is it located? Quote Link to comment Share on other sites More sharing options...
nienberg.11 Posted May 1, 2007 Author Share Posted May 1, 2007 I ended up blocking the flow of coolant to the heater core by clamping a piece of a bolt into the line. Eventually I'll replace that with an inline shut off valve. Quote Link to comment Share on other sites More sharing options...
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