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Blower fan fuse failure when ac engaged

Posted: Thu Mar 01, 2018 8:39 pm
by ecsmoot
1987 635csi- Blower fan fuse blows out when ac button engaged. My mechanic cannot find the short. Any suggestions?

Re: Blower fan fuse failure when ac engaged

Posted: Thu Mar 01, 2018 10:07 pm
by hornhospital
The AC blower and heater/defroster blower are two separate items. Probably the AC fan is stuck or burned out. It's located IN the dash, unlike the heater blower. I don't envy the person that has to dig it out to diagnose the problem.

And this should have been posted in the engine-mechanical-electrical forum, or maybe the interior forum. Maybe one of the moderators can move it.