If the blower speed has a mind of its own - or sometimes doesn't run at
all or goes to full - while the speed display is normal, 99.99% the final
stage resistor. In auto, however, it does vary its speed until near the
correct temp is reached. And on a cold day after a cold start if heat is
called for it won't blow hard until the engine warms up.
*What are the pink bits in my tyres? Cyclists & Joggers*
Dave Plowman firstname.lastname@example.org London SW
Not sure if it throws an OBD fault code for this case, if it does, you can
read that error if you have an OBD scanner (there's a 20pin OBDII port in
the footwell at the driver side)
On 5/16/07 6:06 AM, in article
No OBD codes - those are for emissions components and systems only.
Replacement is the test for this component. There are tests you can do
with a dedicated computer/BMW-code scanning tool - but since these tools
start at $500 - that makes buying one for this test not a rational thing
to do. A dealer could diagnose it for you - cost is typically 1 hour
labor - which in the US is running from $100-125/hour. Again - not a
rational thing to do with a $40 part.
Given the behavior you describe - as Dave said - its about 99% certain
it's the final-stage-resistor.
Thanks all for your suggestions. The symptoms are very much the same
as has been described, so I guess I'll just get the part and see.
Brian, you say it's a $40 part. Do you know where you saw that price?
Everything I see is about $65 and up....
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