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On rare occasion, the cause is FSR, so try a new FSR and see what happens.

To confirm dead blower, you can use the circuit diagram I posted on my E39 for jump starting the blower using 12V. See link below:

DIY: Trouble-shooting HVAC Blower Motor and FSR - Bimmerfest - BMW Forums

The bottom line is: look at the FSR connector itself...

- Jumper in #1 and #4: completing the ground circuit
- Another jumper in #2 and #5, feeding the blower with full 12V, it "should" run at max speed, if not blower is dead.

Just remember to remove the jumper wires when you are done.

^This. Yes the dash has to be yanked but at least you won't have to do it for another 10-15 years at least. Not the best design from BMW for sure. But I would definitely be doing the evaporator at the same time, and anything else not easily accessed.

The only other big part that requires dash removal is the evaporator. Not sure I would consider that preventative maintenance, but something to consider. A leaking evaporator was why I had to pull mine. I think the other parts (heater core, expansion valve) are accessible without dash removal.

Quote:

Originally Posted by David.X5 (Post 1043890)

Not sure what the evaporator goes for in the parts pricing but yeah I'd only want to pull the dash like that once every 12 years or so, so if I had it open to do the blower motor I'd probably do the evaporator too if I was north of the 12+ years in age dept.

It's not an expensive part, but requires recovery of the refrigerant and then refilling.

Quote:

Originally Posted by motordavid (Post 1043829)

Our '01 HVAC blower motor has been chirping for months/a year...
It does it on low more so than on higher fan settings, and weirdly seems slightly highway road speed affected, or maybe it's just 'motion' affected, ;)

NEway, I suspect it is going to go Kaboom one of these days/weeks/months/year.

I was getting some suspension work done at my Asheville Indie a couple weeks ago and mentioned it. He rolled his eyes and said, "Yes we do them, there is an '06 in the end bay we are R & R'ng."

I walked down and looked: it looked like a gut job on the dash board, et al.

He said he has done dozens and it is not his fave job.

When ours goes, it may be time to consider stuff. I have seen the DIY or photos of the 'job' here, and it will not be done by yours truly, and may or may not be done by my Indie.

A ~$200 blower fan motor, with the front end/instrument panel/dash board of a car assembled around it... :(
GL, mD

My fan had been chirping for a while also, which had me worried about blower replacement. But hadn't heard from it in the past few months - hopefully, that's a good sign :dunno: