85 528 heater/vent malfunction - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
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#1 (permalink) Old 10-17-2003, 09:09 PM
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bwm nate is an unknown quantity at this point
(Thread Starter)
The heater works properly stopped at idle. Upon acceleration, a cold air vent opens & blows frosty air into the heat duct.....quite unpleasant! If driven VERY carefully (very minor throttle input) the heat will operate properly at all speeds. There is obviously a problem with a vac solenoid somewhere...but I have not been able to locate it....nor any other apparent vac issue.... ghead

Any ideas?

THNKS!!
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