Pulsating heater/ac cabin fan

Asked by Jan 24, 2010 at 03:03 PM about the 2002 BMW 3 Series 325i

Question type: Maintenance & Repair

The cabin heater/ac fan on my 2002 325i pulsates, especially when cold.  Seems to go away after the car warms up.  I've heard of this problem but didn't pay much attention to what the fix was seeing that I didn't have the problem at the time....now I do, too.  Any idea on how what's the problem and how to fix?   Thanks.

1 Answer

1,765

final stage resistor.its very common.under the dash in the middle and can be accessed on the passenger side.need to pull one of the stepper motos out of the way then its 3 t-20 torx screws.disconnect it pull out the screws then reconnect it and pry the plastic flap holding it in place and pull it out from the harness or connector.prob shouldnt be saying to pull from the harness but that connector and haness is strong as hell.

Your Answer

Add photo

Related Questions

  • BMW 2000 323i heater ac fan 4 answers

    Help anyone...my heater, ac, fan will not blow air. I have a bmw 2000 323i wagon. Fuses look good..what else can I check?

    2000 BMW 3 Series 323iT Wagon

    -

    Maintenance & Repair

  • My heater/air conditioner fan is noisy 2 answers

    My heater/air conditioner fan works great on 1 & 2, but any higher setting gets progressively noisier (and doesn't generate any additional air flow). Before I order a new fan motor, has anyone run int...

    1989 BMW 3 Series 325i

    -

    Maintenance & Repair

  • Has no heat and why is the fan on all the time 9 answers

    4 dr. "VIN#WBAAM3332XCD56099 No heat. Just replaced a radiator hose and now wondering if the thermostat is needed. The fan stays on all the time. Wondering what to do.

    1999 BMW 3 Series 323i

    -

    Maintenance & Repair

  • 2007 bmw 328xi defroster fan heater air conditioning will not work. Is this a fuse or fan issue? 1 answer

    the ac and fan and defroster will not turn on. The indicator lights work. The fuse box does not have the remover and spare fuses, although I am the original owner and do not recall ever using it. Co...

    2007 BMW 3 Series 328xi

    -

    Maintenance & Repair

  • Why does the AC overheat the car engine and AC fan in engine compartment does not come on? 2 answers

    Engine overheats when driving in town with AC on. AC fan in engine compartment does not kick in. Checked voltage at red wire on fan connection and got 13 volts so no fuse blown. AC also takes a while...

    2007 BMW 5 Series 530xi

    -

    Maintenance & Repair

Search BMW 3 Series Questions

BMW 3 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,550
#2 Robert Charlson
Robert Charlson
Reputation 1,520
#3 Matt Mankinen
Matt Mankinen
Reputation 1,180
View All

Related Models For Sale

Used BMW 5 Series
514 Great Deals out of 15,622 listings starting at $2,499
Used BMW M3
39 Great Deals out of 1,702 listings starting at $4,544
Used Mercedes-Benz C-Class
479 Great Deals out of 28,810 listings starting at $1,499
Used Audi A4
185 Great Deals out of 10,891 listings starting at $700
Used Ford Mustang
397 Great Deals out of 47,365 listings starting at $1,999
Used BMW 6 Series
77 Great Deals out of 3,255 listings starting at $6,995
Used Chevrolet Camaro
151 Great Deals out of 32,742 listings starting at $1,729
Used Mercedes-Benz E-Class
371 Great Deals out of 21,760 listings starting at $699
Used Honda Accord
786 Great Deals out of 88,192 listings starting at $1,150
Used BMW 7 Series
195 Great Deals out of 6,107 listings starting at $2,999
Used BMW X5
455 Great Deals out of 16,766 listings starting at $2,000

Used Cars For Sale

2017 BMW 3 Series For Sale
43 Great Deals out of 8,302 listings starting at $27,996
2016 BMW 3 Series For Sale
144 Great Deals out of 3,445 listings starting at $19,995
2015 BMW 3 Series For Sale
19 Great Deals out of 949 listings starting at $15,999
2014 BMW 3 Series For Sale
204 Great Deals out of 4,431 listings starting at $11,980
2013 BMW 3 Series For Sale
91 Great Deals out of 2,856 listings starting at $11,950