Root cause insight into the common BMW blower motor resistorfailures
On Thu, 21 Mar 2013 21:56:49 +0000, mroberds wrote:
> If the failure is that the blower motor doesn't run at all, they are
> probably failing open. If the failure is either that the blower motor
> runs at maximum speed, or a fuse blows, then they are probably failing
> shorted.
Actually, I was remiss in not stating that the blower motor generally
fails by acting weirdly, often said to "have a mind of its own", and,
most often by a parasitic current draw overnight that kills the battery.
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