Quote:
Originally Posted by JDF
If it was the cables - I don’t understand why I still get hot air at low speeds?
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Without the cable holding the flap valve, the incoming air pressure at high speeds closes the flap and directs cold air out the vent. At low speeds the incoming air pressure isn't enough to overcome the air from the blower and the flap valve stays in the warm position.
Or it may be the other way around, with the high speed air creating a venturi effect on the duct and sucking the flap valve closed. Not sure which way the flap goes to switch between hot and cold (never had it apart).
That's my theory anyway...
