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Same problem- heat from defroster and side vents (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Al on October 28, 2001 at 14:42:10:

Ok, I have been dealing with this problem for a while. My 89 750 has hot air that comes from both defrost vents (drivers and passengers side, windshield and side door vents). Additionally, hot air comes from the front center vent on the passenger side. The HAVAC unit temperture wheel works only on the drivers side.I have changed the heater conrol valve already. The stealer gave me a diagram showing the actuator motors and prices that are criminal. Is it possible that my problem is with the HAVAC control unit based upon the above description? Also the stealer gave me a price of $695 for a Heater control Modulater( long narrow part between the heater box and fire wall. Any ideas anyone?

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