Although I got the new FSU, I figured I'd give the "fuse pull" approach a try first to see if it resets things. Certainly easier to do and worht the try. The blower has been behaving erradically: Speeds don't vary, but blower just turns off and on at the oddest times. Anyway, it's my wife's car (LOL as long as she doesn't see this).I read somewhere where a person had this problem and simply replaced (I think by replaced he meant pulled out and put back in) fuse 50 and that solved his problems. I have a fluctuating fan speed sometimes when I turn the unit on then it evens out. I'm trying it to see if it works but has anyone heard of this?
It was my turn to replace the FSU (blower motor resistor). I just got tired of the pulsating pattern of the blower and its shutting off on its own accord. It is especially frustrating in the 100F degrees St. Louis weather. I ordered the part through one of my favorite sites: www.eeuroparts.com that has great prices and both OE and aftermarket parts. The FSU is made by Behr (OEM). The cost was $59.99 shipped. It took an hour to install and it was a pain in the neck (literally) due to its location under the dash. If you have problems with your back/neck/shoulders I'd recommend to delegate this repair to a shop technician (hopefully without these problems). You have to spend some time in the area below the glove box on your back and side with your legs on the passenger seat. There is simply no other way.
The DIY is in the pictures. Sorry if I missed something. But that's just pretty much the way I did it. I'll just mention it here one more time that I did not find it necessary to remove the air duct and control motor to get to the resistor like some other diys suggest. Of course it will make things a little easier but will take more time. And I did not want to spend more time on the 95F degrees evening sweating in the footwell of the car. So here is the pictorial guide:
This diy is for E46 cars only. I'm not sure if E36 FSU is similar or not but if you post in the E36 section of the forum I'm sure you'll get better help there. Here is the link:Hello All,
This is a great forum, thanks so much.
Now...I know the FSU issue has been batted around quite a bit, but here is my issue.
My ac blows cold-..okay cold-ish, except on the driver defrost and floor vents. No matter what the setting is-the air there is hot. Quite hot. Not good in Texas. The other thing is-when I turn the car off I hear a kind of buzz that seems to emanate from behind and to the left of the glove box. Is there where the FSU is on my car? And could that be causing my ac problems? The battery also drains after a couple of days without driving.
Lots more bothersome things going on with this car, but those are the major ones.
The car has 230k miles and has been an absolutely fabulous car for me, but not having proper ac is a drag. I can repair this myself as long as I know where to look for the part. It's not under the passenger beneath the glovebox--at least not that I can see (I removed the cover-which in this case, has two screws-you don't just yank it off).
Help is greatly appreciated.
And, while we're at it, here are the DIYs for the E39 from the bestlinks thread.This diy is for E46 cars only.
The arrow in one of my pictures points to its location. It's not easily visible but can be reached with a torx screwdriver. Just stick a torx driver there and you'll feel it. I took me a good 5-7 minutes to remove that screw, so be patient...On my 2001 M3 convertible..
I am stuck in the middle of this DIY. Before I can have access to the FSU itself, the motor bracket is in the way where I'm having trouble getting out of the way. The lower screw was easily visible and is now removed, now the other screw?? where can I find it.. I've looked around and there nothing visible. Mind you the air duct is still intact since it doesn't seem to pull out easy. Please help!!
Kubi, I also do not mind ebay for some purchases at all. If this is Behr and made in Germany that *should* be fine. The problem with FSUs is that even *good* resistors by reputable German brands still fail. It's important to go with the latest updated and improved version and part number issued by BMW. The one that I and other people used seems to be the latest improved part number and so far so good. If you ordered that ebay resistor just keep us updated how it works out for you. This is how we learn on this forum, mainly from experience of other people. If it fails, let us know and if it lasts a long time let us know too.I personally have no problem of buying parts from eBay. If you look at one of the links above, the part is Behr brand. So there is no question about the part. After I get the original part, the rest is not important to me. I believe the big sellers still have big margins on the parts although they sell less than BMW dealers. I think eBay is the main selling channel for the companies/individuals who have no access to big sellers.
Fsu has nothing to do with cold/hot air just the blower motor speed (pulsating, not working at all, etc). You need to have your ac system diagnosed. If you get a constant stream of air, your fsu is fine but you might have a leak somewhereHaven't noticed any fluctuating fans speeds (unless it's on auto) but my ac is not blowing cold even after a fresh charge. Cool at best.
Could the fsu still be contributing to this even if the blower seems to be functioning normally?
My local mechanic thinks I may have an oil lock in the dryer or a jammed up expansion valve. I'm not sold on any of it. Input would be appreciated.
Great site btw.