E46 air con

[mondeoman]

And in this case I think it is a con :rolleyes:

Mine has stopped responding to the controls - it has a life of its own, on/off, doesn't respond to fan motor speed selection in manual mode. Its a real pain.

Dealer said "they all do that sir", but my last e46 didn't, neither did the 5.

Is there a sensor or something that I should get replaced or is it more likely that the controller unit is knacked?

[Zod]

Complain and tell him he is a liar. I'm, on my fourth E46 with air con and have never had any problems.

[scoobz]

I've seen it happen.

Wouldn't say its common and the workshop always fixed them.

I think its something behind the console, I could be wrong though.

Sorry.... i'm not helping much am I....

[WingChunDave]

It's not a standard feature. My E46 air con doesn't do this.

The problem could be with a resistor pack. My Father has this same problem on his E36.

[fixedwheelnut]

It sounds like a resistor pack [a.k.a 'Hedgehog'] they break down and cause erratic fan speed.
If the resistor is faulty the fan speed increases without a change in the digital bargraph display.
If the bargraph display moves up and down in relation to the fan speed then that is normal temperature regulation in 'Auto' mode.

It's located in the right side of the heaterbox foot well area near the bulkhead.

[mondeoman]

Cheers All! Will get one from a dealer and fit it meself this weekend, let you know if that fixes it.

ps - its £56.51 + VAT, and its a warranty item! (so glad I got the extended warranty) yippee! Now to book it in and get it done.

>> Edited by mondeoman on Friday 1st July 10:13

[gdr]

Do E39 5's have same climate control? My 2000 535i has started doing the same thing, fan goes haywire, bears no relation to manual control.

[WingChunDave]

gdr said:

Do E39 5's have same climate control? My 2000 535i has started doing the same thing, fan goes haywire, bears no relation to manual control.

Can't tell you for sure but chances are it's a standard part. Why make several different units that do that same thing?

It'll probably still cost more for a 5 series though

[WingChunDave]

There is one other thing this might be. My Father (bless him, his air con has been troublesome), has had his air con give him more trouble lately. The resistor pack fixed some things but not others. He's now had a new control unit fitted. Refurb costs around £60.

Some of the symptoms you describe could be down to this too.

Dave.

[mondeoman]

New resistor pack, replaced under warranty.

All sorted now

So glad I got it done before the weekend :sweatdrippiingoffface - not: