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Chirping noise from climate control on 7 Series (archive)

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Posted by Ted on November 05, 2000 at 20:08:03:

Both my 98 740iL & my 2000 740i Sport make the most annoying chirp from the climate control when I am driving on the highway. You can stop the noise by turning the recirculating system on. In fact the chirping occurs as the recirc. kicks in. Try it.
By the way I had the stepper motors changed in both cars, does not fix this problem. Anybody else notice this?

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