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Nate Nagel Nate Nagel is offline
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Default Root cause insight into the common BMW blower motor resistorfailures

On 03/21/2013 10:25 PM, jim beam wrote:
On 03/21/2013 07:23 PM, Nate Nagel wrote:
On 03/21/2013 10:07 PM, jim beam wrote:
On 03/21/2013 09:00 AM, Bimmer Owner wrote:
On Thu, 21 Mar 2013 08:14:12 -0700, jim beam wrote:

it's cheaper to just buy a new one.

To be clear, that's what 99.99999999% of the BMW owners do.
But that's not the point of this thread.

The point of this thread is to get a handle on WHY they are all
failing.

i already told you - it's overheating. semiconductors don't like heat.


Yeah, we know that.

*why* is it overheating?


because it's linear, retard. if you don't know what they means, ****
off until you find out.


so "because it's linear" it by nature overheats to the point of failure?
Odd, I'm pretty sure that that controller worked initially on, well,
all of the vehicles in which it was originally installed.

The question is, is it overheating to the point of failure because the
designer cut things too fine (in which case designing a better part
would be the right approach), or is it because there's another issue
somewhere else *causing* a part that would otherwise have acceptable
service life to fail (in which case replacing it with a stock
replacement and fixing the underlying issue would be the most economical
thing to do)?







Specifically, how to figure that out is the question.

knowing how the light bulb blew doesn't fix it.


But it may make the replacement last longer.


putting facts in front you dumb ass all day long doesn't make you any
smarter.


IKYABWAI.

It would really be just like you to spend all day designing a more
robust controller, building it, watching it too burn up, and then
realize that the problem was something else, like a chronic problem with
dry fan motor bushings, windings dragging on the case, something like that.

But sure, don't check the obvious stuff, just go into your long-winded
sometimes technically correct and sometimes not babble, I know that
anything I say won't stop you anyway.

nate


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