On my 1997 BMW 328is, the A/C works whenever it wants!! (on and off)

Asked by Aug 17, 2009 at 08:48 PM about the 1997 BMW 3 Series 328is

Question type: Maintenance & Repair

On my 1997 BMW 328is, the A/C works whenever it wants!! (on and off)
When it works, it is find!! I think I have a short somewhere???
Any suggestions???

7 Answers

75

I had a similar issue with my '96 328i. The buttons on the climate control worked, but no air blowing through the vents. It turned out to be the Final Stage Unit a.k.a. Blower Motor Resistor. Found one online at SoCal Motorsports for about $75 bucks. Local dealer wanted $135. Do the math. ha ha. Here is a link to DIY http://forums.bimmerforums.com/forum/showthread.php?p=3349096 Hope this helps.

4 of 4 people found this helpful.

wow my car is doing the exact same thing! same year and model and does the same thing. found out its a chip fried iside the panel... $600 to fix or find a whole new panel for 120. so yeah.

45

In my case it was a card that went bad. An electromechanic put a bridge on the fuse box to avoid spending 200 bucks on a new card.

2 of 2 people found this helpful.
1,915

you need a final stage resistor.replace it yourself.u can access it to the left of the passengers footwell.probably need to remove the glovebox or at least the lower panels.

1 of 1 people found this helpful.
3,065

Typically it's the blower motor regulator. I've ran across it on a Mercedes I owned but not one (of the eight) BMWs I've had. It's usually mounted to the blower motor and located either under the glove box or between the firewall and center console depending on the design. The regulator has a heat sink on it to help cool the regulator. Over time they fail or function periodically because it will overheat sooner than normal.

45

can be the compressor clutch failing..

10

can be the fan speed resistor........if the climate controll display-unit in the dash goes on and off, you have to re-solder the little blue capasitor inside the unit on the pc-board. on the right-hand drive cars the fan resistor sits behind the cabby-hole!

Your Answer

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 31,335 nationwide 3 Series listings starting at $795.

ZIP:

BMW 3 Series Experts

  • #1
    Tom Demyan
    Reputation
    4,920
  • #2
    Robert Charlson
    Reputation
    1,610
  • #3
    Matt Mankinen
    Reputation
    1,240
View All

Related Models For Sale

Used BMW 5 Series
462 Great Deals out of 16,477 listings starting at $2,000
Used BMW M3
52 Great Deals out of 1,469 listings starting at $4,990
Used Mercedes-Benz C-Class
612 Great Deals out of 23,245 listings starting at $1,995
Used Audi A4
313 Great Deals out of 10,721 listings starting at $900
Used Ford Mustang
765 Great Deals out of 42,132 listings starting at $1,300
Used Honda Accord
1,046 Great Deals out of 61,437 listings starting at $999
Used Mercedes-Benz E-Class
450 Great Deals out of 19,563 listings starting at $1,500
Used Chevrolet Camaro
421 Great Deals out of 31,631 listings starting at $2,395
Used BMW 7 Series
161 Great Deals out of 6,001 listings starting at $2,500

Used Cars For Sale

2017 BMW 3 Series For Sale
161 Great Deals out of 8,650 listings starting at $25,429
2016 BMW 3 Series For Sale
53 Great Deals out of 1,833 listings starting at $19,500
2015 BMW 3 Series For Sale
30 Great Deals out of 1,166 listings starting at $15,995
2014 BMW 3 Series For Sale
229 Great Deals out of 5,138 listings starting at $13,315
2013 BMW 3 Series For Sale
47 Great Deals out of 1,603 listings starting at $10,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.