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Thread: Replacing Final Stage Blower Resistor pack

  1. #151
    Join Date
    Feb 2008
    Location
    washington, dc
    Posts
    7
    My Cars
    1994 bmw 318i convertible
    I own a 1994 318i convertible and when i turn on my analogue climate control i hear the blower running on all four speeds but no air flow is coming through any of the vents. and when it rains my windows are fogging up making it impossible to see. i have replaced the microfilter and the blower resistor and have checked the fuses under the hood and still i have this problem. very fustrated at this point. any suggestions would be appreciated. Just guessing here but could it be a problem with the valve doors not opening? If so, could you provide an illustration or directions on correcting that if that is the problem.

  2. #152
    Join Date
    Dec 2007
    Location
    Sydney,Australia
    Posts
    198
    My Cars
    99 E36 M3

    Blower fan M3, final stage resistor

    Hey man, thanks for the effort taken to put the info together and explain to some of us first timers. I found the info very useful. I was able to locate and remove the resisitor pack ok. It's a little tight under there but i managed. I thought i'd try something though before disconnecting it. I pulled it out and let it hang while still connected and engaged power, starting the climate control. The resistor pack got pretty hot actually and i don't think this is normal. What do you think. could it pose a fire hazzard ??
    Anyway, i'm going to place an order at my local. Price here in Australia is around $200.

  3. #153
    Join Date
    May 2008
    Location
    indianapolis
    Posts
    16
    My Cars
    01 530i 90 ZR1 99 M

    Hoping for some help on 98 e36 heater/ac unit

    I replaced the final stage as I was having all the issues in the thread (come on and off , some controls worked some did not not ) - now that I have replace the final stage I get nothing from the control unit no lights nothing? I attached the plug to the old final stage to see if there was a issue but got nothing - is there a reset or ?? any help would be great -- it is a 98 328is thx

  4. #154
    Join Date
    Jun 2006
    Location
    langhorne, pa
    Posts
    1,016
    My Cars
    98 black/magma M3 vert
    Quote Originally Posted by Mr M3 View Post
    Hey man, thanks for the effort taken to put the info together and explain to some of us first timers. I found the info very useful. I was able to locate and remove the resisitor pack ok. It's a little tight under there but i managed. I thought i'd try something though before disconnecting it. I pulled it out and let it hang while still connected and engaged power, starting the climate control. The resistor pack got pretty hot actually and i don't think this is normal. What do you think. could it pose a fire hazzard ??
    Anyway, i'm going to place an order at my local. Price here in Australia is around $200.
    i have a fsu for sale. its New and i can ship it to you much cheaper. if you can wait a few days to get it. its been for sale for a while with no bites.

    let me know
    98 Cosmos/Magma M3

  5. #155
    Join Date
    Jan 2006
    Location
    Charlotte, NC
    Posts
    1,700
    My Cars
    Too many...or...NOT
    Nice DIY - I just changed my Final Stage in my 1998 M3/4.

    The current dealer price at Hendrick BMW of Charlotte, NC with CCA Discount is $123.51 (pre-tax)

    Diagnosed, travel to dealer for part and back, replaced - 3 hours.

    Sure....could have got it cheaper online...but with the temp at 100+ deg F right now....it was money well spent
    Nitin G. Shanbhag
    BMWCCA #101510
    87 951, 88 M3 2.5, 88 E30 S52 Project, 95 M3/2 Slicktop, 96 E36 "TrackBeater", 97 M3/4 Slicktop, 97 TJ, 98 M3/4 Daily, 00 F150 7700
    E36 TrackBeater Project Thread: http://forums.bimmerforums.com/forum...d.php?t=884145


  6. #156
    Join Date
    Jul 2008
    Location
    UAE
    Posts
    1
    My Cars
    E36 - 318

    Replaced FSU

    Thanks for great DIY

    I have a 1998 E36 , and I replaced the FSU with a used one ( couldnt get a new one here) , it went fine for a month , now again and myabe once in a week it suddenly stops working , when I disconnect the FSU and connect the old one , it works for a while then stops again , but I noticed that the FSU turns very hot in seconds after connecting it

  7. #157
    Join Date
    Sep 2007
    Location
    Europe
    Posts
    5
    My Cars
    e36, 91', 316i

    what about '91 e36????

    Hi, really nice DIY, but I didn't manage to solve for mine e36.. I have similar problem.. i've got a '91 e36 with analog AC.. The blower works/doesn't work just whenever it wants to... actually it hasn't been working recently for several days now.. all buttons and heater work... but there is no air coming out..on any position..
    As I understand there is no FSU in my model... it could be blower resistor, am I right?
    WHERE should it be located then??

  8. #158
    Join Date
    Oct 2004
    Location
    Windsor, CA
    Posts
    1,408
    My Cars
    1998 M3
    Nice writeup!

    I'm going to have to try this this weekend. My blower stopped blowing today.

  9. #159
    Join Date
    Feb 2006
    Location
    San Diego, CA
    Posts
    208
    My Cars
    1997 Estoril M3
    My symptom:
    -After driving for about 30 seconds, blower would blow full blast no matter which setting (unless off, which worked). '97 M3 (auto climate control)

    I replaced the FSU ($85 pelicanparts) today. It took 30 minutes, then another 30 to get the kick panel back on due to my own ineptitude. Now the blower is functioning normally!

    Thanks for the write-up!
    '97 Estoril ///M3- Dinan Intake, Dinan Gen I Exhaust, Dinan Stage 2 Software, Dinan Front Strut Tower Brace, FK Highsport Coilovers, Bilstein Shocks, TMS RSMs, Powerflex RTABs
    (KIA) '95 Cosmos ///M3- TMS Chip, ECIS Intake, UUC Red TMEs, UUC Clutch Stop, GC RSMs, JTD Underpanel

  10. #160
    Join Date
    Jul 2008
    Location
    nashville tn
    Posts
    339
    My Cars
    Kawi 636, 328, m3
    Ok guys... I have the auto climate control system.... all digital...

    I bought a resistor off the forums and it looks totally different but it clips in place and looks almost exactly the same but the heatsink is different...

    I plugged in the new resistor and still no air blowing out ;(

    Do I need to replace the blower motor? ;( It is HOTTTT

    Black Bimmer too ;(

  11. #161
    Join Date
    Sep 2005
    Location
    Austin Texas
    Posts
    2,957
    My Cars
    2007 x5 4.8l 2004.330ci

    could be FSU and/or digital climate control unit

    First I replaced my Final Stage Resistor pack and things worked right for maybe 3 months. Looking back now I really am not sure if that was a failing part or not? After 3 month hottest in the cabin I could only get like 40% fan speeds or nothing. My feeling here is the climate computer temp sensor circuit (or related) failed when the air temp was hot (80degrees+) I found several fixers of the climate control computer unit on ebay for about $50 and sent mine in for servicing. I believe that all is needed here is a the replacement of a capacitor, but I elected to have the people who have the right capacitor and knownledge make the fix as I didn't want to risk messing on the the oterwise expensive computer control part.

    Been working fine for about 4 months now. The e36 has several electrical weaknesses think I have all but an occassional door accuator issue fixed now

  12. #162
    Join Date
    Nov 2006
    Location
    East Coastin'
    Posts
    1,553
    My Cars
    986 - C4S - 318TI
    I'm not sure if my FSU is the right idea but I'm curious to see if you guys think these are symptoms of the FSU failure.

    -AC controls change speeds on their own
    -AC turns on by itself randomly
    -I'm hearing a blowing sound and getting a little bit of air through the vents even with the climate control completely off and the car sitting stationary.

    Should I go with replacing the final stage unit? Or do the capacitor in the climate control computer? Anyone have a good idea which one is the culprit in my case?

    Thanks!

  13. #163
    Join Date
    Oct 2008
    Location
    Clemmons, NC
    Posts
    9
    My Cars
    2008 BMW 550i
    Quote Originally Posted by ///BMW View Post
    -I'm hearing a blowing sound and getting a little bit of air through the vents even with the climate control completely off and the car sitting stationary.

    Same thing has been happening with my car recently. Not sure if it's the FSU as everything else is working fine.

    Will be pleased to hear what others think.

  14. #164
    Join Date
    Feb 2002
    Location
    The Garden State
    Posts
    1,375
    My Cars
    E46 M3/E46 325/E70 X5
    Quote Originally Posted by ///BMW View Post
    I'm not sure if my FSU is the right idea but I'm curious to see if you guys think these are symptoms of the FSU failure.

    -AC controls change speeds on their own
    -AC turns on by itself randomly
    -I'm hearing a blowing sound and getting a little bit of air through the vents even with the climate control completely off and the car sitting stationary.

    Should I go with replacing the final stage unit? Or do the capacitor in the climate control computer? Anyone have a good idea which one is the culprit in my case?

    Thanks!
    Sounds like the FSU, even in my E46 the same symptoms occurred until it just blew on high (I had to pull a fuse to get it to stop).

    Replaced the FSU and all was perfect again. Good Luck.
    FOR SALE: 1995 325 BMW Convertible - Black/Black
    http://www.bimmerforums.com/forum/sh...haust-and-More


  15. #165
    Join Date
    Jan 2005
    Location
    Little Neck, NY
    Posts
    144
    My Cars
    96 328is, 94 Miata
    i know this is an old thread but I just used your instructions and wanted to say THANK YOU! now my 8month old won't freeze his baby balls in the back seat.

  16. #166
    Join Date
    Jan 2008
    Location
    Madison, WI
    Posts
    195
    My Cars
    2015 Tesla Model S 90D
    I just replaced this part and now I have heat.... but only on high or off settings.


    Is there another part that needs to be replaced? Looks like it has been covered but I'm still not sure exactly. After reading through a few pages it looks like it may be a capacitor inside the unit? does this sound right?
    2015 Tesla Model S 90D

    2010 BMW 550i M-Sport FOR SALE $5850 pm me if interested

  17. #167
    Join Date
    Jul 2008
    Location
    Sacramento, CA
    Posts
    1,304
    My Cars
    Avus M3
    Quote Originally Posted by e36 bimmer View Post
    I just replaced this part and now I have heat.... but only on high or off settings.


    Is there another part that needs to be replaced? Looks like it has been covered but I'm still not sure exactly. After reading through a few pages it looks like it may be a capacitor inside the unit? does this sound right?
    I would guess the blower resistor may need to be changed out.

  18. #168
    Join Date
    Dec 2005
    Location
    Philippines
    Posts
    497
    My Cars
    bmw e36 M3
    i have a digital climate control. for first 20mins my fan speed is ok. every level or step is ok. but after 20 mins, the blower fan will decrease, then the step 6-8 or the last 3 step (blower fan) will not work.

  19. #169
    Join Date
    Oct 2006
    Location
    Sacramento, CA
    Posts
    181
    My Cars
    1999 m3 cosmos

    revolution based ticking

    Quote Originally Posted by Uberdude328i View Post
    My symptoms:
    3. Chirping sound and a revolution based ticking sound (more on that below).

    As for the revolution based ticking noise mentioned in symptom three, it worries me. It sounds as if its linked to something speeding up and slowing down i.e. the blower itself. I'm afraid its literally becoming a ticking time bomb. We'll see what happens, it still has the ability to blow when it wants to.

    Great write-ups by the way.
    I know I am bringing this thread back from the dead but I have this exact ticking sound that I can feel on the brake pedal, occasionally. Does anyone know what the hell this is caused by?

    I am replacing the FSU on friday to fix my blower issue...

  20. #170
    Join Date
    Dec 2005
    Location
    Philippines
    Posts
    497
    My Cars
    bmw e36 M3
    Quote Originally Posted by binarystar View Post
    I know I am bringing this thread back from the dead but I have this exact ticking sound that I can feel on the brake pedal, occasionally. Does anyone know what the hell this is caused by?

    I am replacing the FSU on friday to fix my blower issue...
    where did you buy your fsu? thanks

  21. #171
    Join Date
    Oct 2006
    Location
    Sacramento, CA
    Posts
    181
    My Cars
    1999 m3 cosmos
    Quote Originally Posted by joshe36316i View Post
    where did you buy your fsu? thanks
    I purchased at a local euro parts wharehouse, oem products without the dealership prices. Its called FPS, foreign parts specialist... paid 89 total

  22. #172
    Join Date
    Mar 2009
    Location
    United Kingdom
    Posts
    1
    My Cars
    BMW E39 528

    BMW E39 Heater Problem

    Hi, Fantastic Writeup. My car seems to be having a different problem. The blower works fine and so does the AC. The Heat does not always come out though. It works intermittently. If I put the fan on Windscreen Demister, it blows out warm air (corresponds with the CLimate control temperature) but when using the fan normally, it blows out cold air. Any advise? There are the odd days when the heating works fine but its becoming rarer by the day.

    Any advise would be handy.

    Oh yeah the model is 2000 RHD. Im not sure if these come with a seperate blower resistor but isnt that just a fan speed regulator rather than termperature?
    Last edited by Dipsgti; 03-30-2009 at 11:29 AM. Reason: Automerged Doublepost

  23. #173
    Join Date
    Jun 2009
    Location
    UK
    Posts
    3
    My Cars
    E36 1998 RHD

    Fan Blowing but no air coming out of vents

    Hi

    The car in question is a 1998 E36 318i (RHD). I've recently replaced the capacitor in the climate control unit to stop it switching off and on randomly but now I'm left with the current situation:

    Fan can be controlled from the CCU and you can hear the fan running but no air comes out of the vents.

    Would this be the resistor pack or the final stage unit? Also, has anyone got any advice as to where to purchase these bits in the UK please?

    Many thanks in anticipation.

  24. #174
    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
    Hi

    The car in question is a 1998 E36 318i (RHD). I've recently replaced the capacitor in the climate control unit to stop it switching off and on randomly but now I'm left with the current situation:

    Fan can be controlled from the CCU and you can hear the fan running but no air comes out of the vents.

    Would this be the resistor pack or the final stage unit? Also, has anyone got any advice as to where to purchase these bits in the UK please?

    Many thanks in anticipation.
    If resistor pack is bad then fan runs too slow for bars shown but you would still have some air.. If you hear fan running but cant get any air I would think
    it's a actuator for venting perhaps. No air on recirculate or any vent setting?

    I doubt it could be a horribly dirty cabin filter but if that hasn't been changed in 100,000+ it might be worth doing. Note it's not easy to change the E36 cabin filter.

    Do you hear vents change when you switch from recirc, hi-vent front-vent?
    IF not then all the more I am thinking venting isn't working.

  25. #175
    Join Date
    Jun 2009
    Location
    UK
    Posts
    3
    My Cars
    E36 1998 RHD
    If resistor pack is bad then fan runs too slow for bars shown but you would still have some air.. If you hear fan running but cant get any air I would think
    it's a actuator for venting perhaps. No air on recirculate or any vent setting?

    I doubt it could be a horribly dirty cabin filter but if that hasn't been changed in 100,000+ it might be worth doing. Note it's not easy to change the E36 cabin filter.

    Do you hear vents change when you switch from recirc, hi-vent front-vent?
    IF not then all the more I am thinking venting isn't working.
    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

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