A/C not working possible resons why?

30

Asked by Apr 19, 2010 at 08:05 PM about the 2002 BMW 5 Series 525i

Question type: Maintenance & Repair

So the air conditioner wont go on and the display panel says its on full blast.
i looked under the hood and nothing seems to be wrong.
it makes a sound where the two filters on the side are when i try to turn it on but no air comes out.
so if someone can help me out and give me reasons why it isn't blowing please let me know id really appreciate it.

2 Answers

2,175

The Final Stage Unit (FSU) needs to be replaced. This is a rather common failure with our e39 chassis. The FSU is a resistor/heat sink that controls the blower speed of the ventilation system. When this unit fails, the blower speed cannot be controlled (completely shuts down in your case) by the clinmate control panel. Fortunately, BMW has since come up with a sturdier direct replacement. This part costs around CAD$85 and is a very simple DIY job. Follow this link for detailed instructions: http://www.bimmerfest.com/forums/showthread.php?t=143393 and be sure to have your physiotherapist's phone number handy as your neck may need attention.

10 of 10 people found this helpful.
30

Another question. Where can I find this part? And is it easy to install?

3 of 3 people found this helpful.

Your Answer

BMW 5 Series Experts

  • #1
    Tom Demyan
    Reputation
    2,120
  • #2
    Michael Branan
    Reputation
    780
  • #3
    Robert Charlson
    Reputation
    690
View All

Related Models For Sale

Used BMW 3 Series
1,082 Great Deals out of 33,744 listings starting at $1,000
Used BMW 7 Series
125 Great Deals out of 5,549 listings starting at $1,995
Used Mercedes-Benz E-Class
598 Great Deals out of 20,663 listings starting at $2,495
Used BMW 6 Series
86 Great Deals out of 2,618 listings starting at $5,987
Used BMW X5
348 Great Deals out of 13,563 listings starting at $2,500
Used Mercedes-Benz C-Class
730 Great Deals out of 28,299 listings starting at $1,000
Used BMW M5
14 Great Deals out of 609 listings starting at $9,769
Used Audi A6
159 Great Deals out of 6,855 listings starting at $1,795
Used BMW M3
34 Great Deals out of 2,027 listings starting at $6,995
Used Mercedes-Benz S-Class
159 Great Deals out of 7,111 listings starting at $2,888
Used Audi A4
296 Great Deals out of 12,012 listings starting at $199
Used Honda Accord
1,035 Great Deals out of 59,785 listings starting at $1,099

Used Cars For Sale

2018 BMW 5 Series For Sale
3,154 listings starting at $49,488
2017 BMW 5 Series For Sale
25 Great Deals out of 1,752 listings starting at $46,900
2016 BMW 5 Series For Sale
16 Great Deals out of 537 listings starting at $24,991
2015 BMW 5 Series For Sale
37 Great Deals out of 907 listings starting at $18,981
2014 BMW 5 Series For Sale
209 Great Deals out of 3,113 listings starting at $14,822

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.