okay guys, here is my question.I have a problem with my blower, also with my battery constantly going flat. Looking on another website I see that some people are claiming it is the final stage unit. I suspect this may be the problem I have. My heater/air conditioning unit has been playing up for the last year or so, and my battery has been going flat for the last year or so. Many of our American friends who have suffered similar problems, claim that by changing the fsu unit, everything is fixed.

Apparently the heater comes on when there is nobody in the car, even when it is turned off and locked up, the dammed thing is whirring away on low. This would apparently drain the battery overnight, leaving you with a flat battery when you return to the car.this is where I am faced with the dilemma, is the final stage unit, the same thing as a hedgehog? I have no idea what a hedgehog is, but it seems to cause lots of problems. Can anyone enlighten me, or perhaps make any suggestions regarding the final stage unit. Once again thanks for your help in advance.

Jim

http://www.bimmerfest.com/forums/showthread.php?t=143393

Yes they're one and the same thing.

thanks for the reply V8, I am just learning about this little sucker. Found this on Motormec website http://www.motormec.co.uk/aircon.pdf they have the part at a very reasonable price. And this DIY to show you how to replace it. Would you believe it I have had BMWs for years and never heard of this problem. Oh well you live and learn.

Yep thats the kiddy :) I had to change mine a while ago :)

It's NOT the resistor (hedgehog type) that's whirring away, its the control unit !!! But it is the cause LOL

waiting for motormec to deliver my noo one.Did you suffer the dead battery too snypa? It looks a ##### to swap,cant wait.

Nah cos ive got a monster battery ! The swap was a bit tricky but but pretty easy enough :)

i got a monster batt too,but think the hog drained it,will fit it tomoz if weather permits. The hog motormec sent is unbranded! despite their claim it is oem,should i be worried(i am)?

No, it'll be fine ;)

No, it'll be fine ;)

mmmmmm,still worried looks like a cheap copy to me.

aaaarrrrrrggghhhhhhh,cant get at that infamous screw!

cant undo it wit a driver! will have to buy a tbar thing tomoz. ##### of a thing.

"Use the Force, Luke"

still at it,got the correct tool,but its a ##### to find da top screw.

Done it,what a !Removed!! Anyone claims this is easy is lying.That top screw is mad! Will be interesting to see if the flat battery prob is fixed too. YEEEEE HAAAAAAAAAA

woop woop its fixed,no more flat battery. No more dodgy blower. poo job but worth it. Can best be done by a dwarf with eyes on a stalk.

Hahahahaha... Happy days again matey ;)