Quote:
Originally Posted by ls1nova71
A gen iv servo operated shut off valve wont open when the key is turned off, they stay where they are until changed, meaning if you have it set to cold, the valve will be shut. When you turn the car off it will remain shut. If you turn the fan off, and then change it to hot, the valve will remain shut until you turn the fan back on, then the valve will open and let water flow through the heater core. All the servos work like this including the blend doors. When you shut the car off they dont default to the defrost position do they? If youre getting heat in the heater core with the heat valve shut to offf, to me sounds like a bad valve, I would contact VA and see what they say, maybe they'll srnd you a new one.
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I can try contacting them again, but I want to say that I contacted them a while back and they told me then that it was normal operation or it to open when the ignition was off.