Quote:
Originally Posted by kerry edwards
Are you saying it works on defrost but nothing else? Or that it only initially works on defrost and afterwards will not work at all, including defrost?
I believe I have read on this board that a failure in the auxilliary pump of some kind will cause the pump to draw too much current and burn out the board in the control unit. Some people put a fuse in the auxilliary pump circuit to stop this problem I believe. Perhaps this is your issue.
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All the settings work initially for about 10 minutes. Which pump are you talking about? I was suspecting the motor was drawing too much and was wondering if it drew power through the control unit. Each time the board goes up I hear a chirping very briefly. It sounds similar to a hooter valve on a turbo (if anyone owns a Saab, you know what I'm talking about). That is why I thought it was a vacuum noise but I suppose it could have been a bushing dragging.