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Re: HELP: Heater is not working (archive)

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Posted by Bob Hazelwood on September 23, 1998 at 09:08:07:

In Reply to: HELP: Heater is not working posted by Anatoly Z. on September 22, 1998 at 13:32:33:

: Please, help me figure out why the heater on my '90 BMW 535i is not working. When I turn on the rotary blower fan and temperature controls it blows the cold air.
: Thank a lot.
: Anatoly Z.
: '90 BMW 535i

Is there a buzzing sound coming from the area near the heater valves? I've known at least three E34 owners (including me) who found the auxiliary circulation pump became jammed. If this happens, you'll hear a buzz whenever the pump tries to operate. It can be repaired without requiring replacement.

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