Quote:
Originally Posted by MPDano
They are right on the money. I have an earlier 928 and it is the same set up, but different looking valve. Stupid valve will stay open on default. No vacuum, no close. Diaphragm bad, no close. This is the source of your heat. I went through the same thing.
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Sounds like the engineers decided it would be better to have heat than no heat when the system failed.
Nothing worse than driving a car in the winter with a plugged up heater coil and no heat at all.
In the summer, just roll down your windows.
