Quote:
Originally Posted by RedArrow
topic: ``Trying to help cooling by having the heater on, to avoid overheating. ``
Ngoma you wrote that
...``That heater coolant valve is normally open at rest. Vacuum closes it. System was designed to flow coolant always thru the heater core, except when A/C set to max. Also, the butterfly flap in the valve, when open, is really only open about 30%.``...
May I ask what`s the case if my AC is not functional? I have no belt on+ compr frozen or clutch bad, idk. (I never struggled much to solve what`s wrong with it. I should have... but the killer Summer is over soon. ) Thanks.
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Has nothing to do whether the A/C compressor is functional. The HVAC control (on dashboard) opens a port to pull vacuum thru the hose to the pot on the heater valve that closes the heater valve when knob is set to max A/C cool.
I like having A/C operational during winter. It clears the fog off the glass within seconds!