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Thread: A/C Fan Speeds

  1. #1
    Join Date
    Apr 2013
    Location
    Ridgewood, NJ
    Posts
    301
    My Cars
    1995 318i fac sport susp

    A/C Fan Speeds

    We bought my son a 1995 318 ten years ago. My memory is that the air conditioner blew weakly on fan speeds 1, 2 and 3 and then on speed 4 it blew much more. Recently speeds 1, 2, and 3 stopped working altogether, and we had our service station replace whatever it is what controls speeds 1, 2, and 3. They told us that for the highest speed, 4, it bypasses the thing that controls the fan speed.

    My son now tells me that speeds 1, 2, and 3 seem to work but weakly, and 4 is fine.

    So - is this just the way they work? Any insights appreciated.

    Thanks in advance for your replies.

    -S-

  2. #2
    Join Date
    Jun 2010
    Location
    NY
    Posts
    9,098
    My Cars
    1997 328i
    Have you ever replaced the cabin air filter?
    Attn. NEWBIES: Use the search feature, 98% has already been discussed.
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  3. #3
    Join Date
    Apr 2013
    Location
    Ridgewood, NJ
    Posts
    301
    My Cars
    1995 318i fac sport susp
    Quote Originally Posted by Eric93se View Post
    Have you ever replaced the cabin air filter?
    IDK but I will ask and report back.

    Thanks.

    -S-

  4. #4
    Join Date
    Mar 2019
    Location
    ATLANTA GA
    Posts
    571
    My Cars
    456 X3s
    So you've had this problem for 10 years...? at any rate sounds like the FSU needs replacement and also check assigned fuses.

    Sent from my TMAF035G using Tapatalk

  5. #5
    Join Date
    Jun 2010
    Location
    NY
    Posts
    9,098
    My Cars
    1997 328i
    10+yo cabin air filter will be plugged, be sure to vacuum out the chamber.
    Attn. NEWBIES: Use the search feature, 98% has already been discussed.
    Click the search button, select "search single content type", select the "e36 sub forum" specifically, try the "search titles" then try the "search entire posts".

  6. #6
    Join Date
    Jan 2011
    Location
    Tampa Bay, FL
    Posts
    511
    My Cars
    1997 BMW M3
    Definitely sounds like the FSU. Fortunately they’re pretty cheap.

    +1 for the caning filter check. People hardly think to clean/replace them. Generally full of leaves and dirt.


    Sent from my iPhone using Tapatalk
    1997 Cosmos Black M3 (03/2014 - ...?)
    1996 Arctic Silver 328is (02/2013 - 11/2015)

    1994 Calypso Red 325i (08/2010 - 02/2013)

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