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Thread: Replacing Final Stage Blower Resistor pack

  1. #176
    Join Date
    Jan 2004
    Location
    Charleston, SC
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    416
    My Cars
    E46M3 Track/MCoupe DD
    Add another thank you to this long list.

    My fan was just stuck at its lowest speed. Not good in SC in Summer!

    Its great to have the fan blowing at all speeds again (read HIGH).

    Thanks very much!

    John Corbs

  2. #177
    Join Date
    Oct 2004
    Location
    Chicago, IL, USA
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    47
    My Cars
    1999 M3
    hey, thanks for the write up. I just completed it and seems to have fixed the issue.

    Quick question : I was unable to get the footwell air duct back on for some reason and gave up. Will this have a mechanical impact or is this for the AC to cool my feet?

    Thanks

  3. #178
    Join Date
    Sep 2005
    Location
    Austin Texas
    Posts
    2,957
    My Cars
    2007 x5 4.8l 2004.330ci
    Quote Originally Posted by managerxxx View Post
    Actually I think you might be on to something. I don't ever recall hearing the actuators on this car - how easy are they to get to/changed? Many thanks for your thoughts on this.
    Regards
    I believe this might mean replacing the heater box. A new heater box and related parts would be very expensive BUT for the good news I have seen them on ebay for cheap recently.

    The real bad news is the heater box is buried under and behind the dash and you have to take the dash out and discharge the AC. If I had a car that needed that problem fixed I think I would pretend is was a model-T without heat or AC. Scary job and dangerous. So hopefully it is something easier than replacing the heater box ... perhaps you could get a estimate from a good-honest independent shop.

    Of course check all fuses but I doubt that will be the problem. Has your cabin filter ever been replaced ,,,, if never and it's 100,000 plus and you part under trees then perhaps there is a pile of leaves in the works?

  4. #179
    Join Date
    Jan 2004
    Location
    Charleston, SC
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    416
    My Cars
    E46M3 Track/MCoupe DD
    Quote Originally Posted by Legacy3281 View Post
    hey, thanks for the write up. I just completed it and seems to have fixed the issue.

    Quick question : I was unable to get the footwell air duct back on for some reason and gave up. Will this have a mechanical impact or is this for the AC to cool my feet?

    Thanks
    The air duct has two of those push pins, one above and one below. You really have to take the knee panel off to be able to see how it hangs together and gain access.

    It seesm to me that the only impact is that the air will not be directed at your feet, just to horizontally to the left. Not sure how much heat you use and what impact that might have on the wiring...........I suspect negligible.

  5. #180
    Join Date
    Oct 2004
    Location
    Chicago, IL, USA
    Posts
    47
    My Cars
    1999 M3
    makes sense...thanks again

  6. #181
    Join Date
    Jan 2007
    Location
    San Rafael, CA
    Posts
    3
    My Cars
    1996 M3 Coupe 5-spd
    I can't believe I've been driving my M3 for so long without having the full use of my fan! My digital climate control's display was fine on my 1996 E36 M3, and the fan would respond to my inputs from about 10% speed up to 50% speed, but then it would only blow at 50% capacity even if I selected 100% fan speed. A few times, a minute or so after starting the car and after going over a speed bump, my fan speed would all of a sudden increase to 100% for 10 seconds, then drop back to 50%. $76 later and P/N 64-11-6-929-540-M58 from pelicanparts dot com, and I'm back in business. I followed the instructions on bmwe36blog dot com 'fixing-bmw-e36-blower-fan-speed-diy' and I was able to change out my FSU without even removing the HVAC duct (be gentle with the footwell cover - it gets brittle with age). It fixed the problem right away and now it works as it should. Now I can't wait to defog my window quickly, and feel my AC blasting 100% in the heat of summer!

  7. #182
    Join Date
    Feb 2002
    Location
    The Garden State
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    1,375
    My Cars
    E46 M3/E46 325/E70 X5
    Quote Originally Posted by milfalleyM3 View Post
    I can't believe I've been driving my M3 for so long without having the full use of my fan! My digital climate control's display was fine on my 1996 E36 M3, and the fan would respond to my inputs from about 10% speed up to 50% speed, but then it would only blow at 50% capacity even if I selected 100% fan speed. A few times, a minute or so after starting the car and after going over a speed bump, my fan speed would all of a sudden increase to 100% for 10 seconds, then drop back to 50%. $76 later and P/N 64-11-6-929-540-M58 from pelicanparts dot com, and I'm back in business. I followed the instructions on bmwe36blog dot com 'fixing-bmw-e36-blower-fan-speed-diy' and I was able to change out my FSU without even removing the HVAC duct (be gentle with the footwell cover - it gets brittle with age). It fixed the problem right away and now it works as it should. Now I can't wait to defog my window quickly, and feel my AC blasting 100% in the heat of summer!
    See, I have the same problem even after replacing my FSU on my '96 328i. I hit a bump and WHOOSH - all fan speeds engage. It's hit or miss the next time I start the car, but mostly all "miss". Sometimes I wonder if it's my blower motor itself that is failing...
    FOR SALE: 1995 325 BMW Convertible - Black/Black
    http://www.bimmerforums.com/forum/sh...haust-and-More


  8. #183
    Join Date
    Jun 2005
    Location
    New England
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    25,402
    My Cars
    F90 M5; E36 M3 Turbo
    Any reason not to buy the Behr FSU for $43 instead of the OEM one for $76? I am going to do this job.

  9. #184
    Join Date
    Jan 2007
    Location
    San Rafael, CA
    Posts
    3
    My Cars
    1996 M3 Coupe 5-spd
    Quote Originally Posted by pbonsalb View Post
    Any reason not to buy the Behr FSU for $43 instead of the OEM one for $76? I am going to do this job.
    Nope, go with the BEHR if you want - they were out of stock of the BEHR when I checked, so I went with the OEM. I grouped it with a big order for brake rotors, etc. so shipping was free. A/C is working great....now for those brakes....and whatever else the ///M throws my way....

  10. #185
    Join Date
    Jan 2004
    Location
    Mililani Mauka
    Posts
    1,207
    My Cars
    2016 M4
    This is a great writeup. I just finished mine and now I have A/C and heat and defroster and AIR!! Whhoooootttt.

  11. #186
    Join Date
    Jan 2008
    Location
    Memphis TN
    Posts
    261
    My Cars
    1997 E36 M3
    what is the difference between the $76 replacement unit and the $43 replacement unit on pelican parts. I typed in P/N 64-11-6-929-540-M58 and the two matches came up with different prices...

    anyone have an answer for me?

  12. #187
    Join Date
    Jun 2005
    Location
    New England
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    F90 M5; E36 M3 Turbo
    Read several posts above.

  13. #188
    Join Date
    Jan 2008
    Location
    Memphis TN
    Posts
    261
    My Cars
    1997 E36 M3
    Missed that one.

  14. #189
    Join Date
    Apr 2006
    Location
    Ottawa
    Posts
    13
    My Cars
    96 328is, 94 318is

    how to FIX blown resistor pack on OBDI e36's

    So for anyone with an OBDI E36 (heater controls are the dial types),.. you can REPAIR your resistor pack! The pack has a Thermal Fuse at the very end of it that will blow (open) if the unit overheats. This is why most of them fail. The fuse is: pat microtemp 4468a ckacn (240 degree celcius).
    In the image below you can see the silver fuse on the opposite end as the black connector.

    WARNING: if you try to solder this fuse understand that it will open at 240 degrees celcius,.. so use cold solder paste or something similar (even crimping it will work).

    All done


  15. #190
    Join Date
    Aug 2009
    Location
    Islip, NY
    Posts
    151
    My Cars
    1995 M3
    My blower only works on high (with or without AC on), I have a 95 so it has the dials instead of buttons. 1-4 are the same as off, only on 5 does it kick on, the air is powerful so I assume at 5 it is blowing the correct amount of air, but cant be sure.

    Would this be the culprit for that?

  16. #191
    Join Date
    Apr 2006
    Location
    Ottawa
    Posts
    13
    My Cars
    96 328is, 94 318is
    Quote Originally Posted by Krause View Post
    My blower only works on high (with or without AC on), I have a 95 so it has the dials instead of buttons. 1-4 are the same as off, only on 5 does it kick on, the air is powerful so I assume at 5 it is blowing the correct amount of air, but cant be sure.

    Would this be the culprit for that?
    Yes;
    Try what I suggested above. Infact,.. before you go out to buy a new thermal fuse ($2),.. try just bypassing it with a paperclip. If the paperclip allows all of your speeds to work,.. then you know that its the thermal fuse. Please keep in mind that you need to cold solder the new fuse on.

  17. #192
    Join Date
    Aug 2004
    Location
    Fresno, CA
    Posts
    1,244
    My Cars
    2002 330i, 2000 528iT
    I guess I'm going to have to get this part too. I'm having the either it works or doesn't problem, very frustrating. Thanks for the write up!
    | 2002 330i 5-SPD - 101k | 2000 528iT - 146k |
    My E46 Maintenance Thread http://forum.e46fanatics.com/showthread.php?t=1124584



  18. #193
    Join Date
    Feb 2002
    Location
    The Garden State
    Posts
    1,375
    My Cars
    E46 M3/E46 325/E70 X5
    Just some follow up on my particular issue:

    1) Replaced FSU as a first step - didn't solve the problem, but I have a new FSU!
    2) Climate control remanufactured - used ebay vendor and it works - didn't solve the problem, but I have a good working Climate control unit
    3) Finally got around to opening the blower motor compartment from the engine and the blades were just a little seized. tapped the motor with a screwdriver -Whooooshh off it went..lubed up the blades and hit them with some pbbaster and it consistently turned on and off

    side note: I never knew that the FSU was visible from the Blower motor vantage point


    2
    FOR SALE: 1995 325 BMW Convertible - Black/Black
    http://www.bimmerforums.com/forum/sh...haust-and-More


  19. #194
    Join Date
    Aug 2004
    Location
    Fresno, CA
    Posts
    1,244
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    2002 330i, 2000 528iT
    I just put my unit in today. Works so far. Did they jack up the price on this part? After taxes it was $175 . I asked for the discount and the dude asked if I had a account. I don't think he got it. Obviously I didn't have an account I just wanted him to put the code in like the young guy used to do for me all the time.
    Last edited by shoman24v; 10-11-2009 at 01:16 PM.
    | 2002 330i 5-SPD - 101k | 2000 528iT - 146k |
    My E46 Maintenance Thread http://forum.e46fanatics.com/showthread.php?t=1124584



  20. #195
    Join Date
    Jan 2009
    Location
    Simcoe Ontario
    Posts
    68
    My Cars
    97 318IS m44 auto
    question:

    if the fsu is the new part number, there's power (9.5v) going into the plug of the fsu, fuse #20 30 amp is .5 ohms (car off) and the metal prongs of the fsu unit is .5 ohms, where do I go from here?

    climate control unit works (lights, temp control you hear vents closing and opening in the background) but absolutely no fan speed running.

    318is please help!
    Last edited by vap3; 10-11-2009 at 05:43 PM.

  21. #196
    Join Date
    May 2004
    Location
    Florida Panhandle/ Ohio
    Posts
    7,318
    My Cars
    14 JGC/13 E88 128i
    Try wiggling the FSU while the system is on. Many reports about that wiring bundle having a loose connection which can be solved.

    These fans don't last forever, just because the fan will turn doesn't mean it will run. What happens is that the brushes are shot, the bearing are shot and when it does work which us usually is when it is cold out. Once warm the fan will not run, it will pull a alot of amps and most likely blow a fuse or ruin the FSU.

    Been there done this...

    Again wiggle the FSU wiring bundle with the ccu in the high fan speed position. If that doesn't work and the fuses are good as well as the relay it is the blower.
    Last edited by fun2drive; 10-11-2009 at 07:18 PM. Reason: Automerged Doublepost

  22. #197
    Join Date
    Oct 2005
    Location
    Glendale, CA
    Posts
    3,272
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    2014 Porsche Cayman
    BM
    Quote Originally Posted by shoman24v View Post
    I just put my unit in today. Works so far. Did they jack up the price on this part? After taxes it was $175 . I asked for the discount and the dude asked if I had a account. I don't think he got it. Obviously I didn't have an account I just wanted him to put the code in like the young guy used to do for me all the time.



    wow bro you gotta do some shopping
    http://www.bmaparts.com/item.wws?sku...er&weight=0.35
    75 bucks, and BMA Parts is an awesome place.

    looks like the price has jumped on BavAuto
    I bought mine for like 70 a couple years back its now 90 there.

    Rule the Bends, Bend the Rules

  23. #198
    Join Date
    Aug 2004
    Location
    Fresno, CA
    Posts
    1,244
    My Cars
    2002 330i, 2000 528iT
    Well, I went to the dealer and bought an original part.

    acutally, looking at bav according the the photo its the same one I got. I will call them Monday and probably reorder, assuming I can return the one from BMW.

    $60 less then bav makes me unsure if it's an original part, and the part number listed on the site is not the same as the OE one.
    Last edited by shoman24v; 10-11-2009 at 09:36 PM.
    | 2002 330i 5-SPD - 101k | 2000 528iT - 146k |
    My E46 Maintenance Thread http://forum.e46fanatics.com/showthread.php?t=1124584



  24. #199
    Join Date
    Oct 2005
    Location
    Glendale, CA
    Posts
    3,272
    My Cars
    2014 Porsche Cayman
    you usually cannot return electrical items, just replacement if defective.

    Rule the Bends, Bend the Rules

  25. #200
    Join Date
    May 2008
    Location
    Fort Erie, Canada
    Posts
    1
    My Cars
    98 328is
    Hey thanks for posting this DIY I just replaced my FSU on my 98 328IS and mine had an extra screw at the bottom and it was a pain in the butt to get the driver side plastic off. All and all it was well worth it now my heat is back especially here in Canada where it can get pretty cold. Just on a side note on the 328IS as soon as I removed the plastic heat for the feet I could see the FSU thanks again!

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