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Re: BMW blower problem (archive)
[ Follow Ups ] [ 7-series (E23) Message Board ] [ Msg. Board FAQ ]
Posted by John Stein on August 19, 2001 at 06:36:53:

In Reply to: BMW blower problem posted by colin Tams on August 18, 2001 at 20:14:14:


My blower slowly gave out over the winter on my '86 735i. The fan doesn't work at all now. I can still switch from heat to AC, etc. and it all seems to work, but only air is that forced through car at speed...insufficient to really cool or heat the car. How do I get at the blower motor? What should I look for, test, etc., first? Anyone have pix of the procedure? Thanks.

Does it work with only the defrost button pushed?

How about if the fan speed is pushed to the high speed.

Have you opened the cowel area and actually rotated the fan...

If the fan rotates freely, and the fan was working normally before... Then suspect the power transisters located unside the fan cage. While you have the cowel area open, remove the fan cage top covers and inspect the transister modules... When I replaced mine, the assembly was visably damaged and burned looking... The power transister modules are not cheap. $100USD ea and you need 2 of them.

Regards

John Stein
85 745
85 ///M6




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