Re: Heater won't completely shut off hot air

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Re: Heater won't completely shut off hot air[900/92up] posted by John Sargent on
Monday, 2 October 2000, at 8:14 p.m.

Yes. Vacuum to close the water valve is only applied at port 1 in AC mode and vent mode. Floor, floor/defrost, and defrost positions of the heater selector lever do not apply vacuum to the water valve, and it allows full flow of engine cooling water through the heater core.

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