Results 1 to 12 of 12

Thread: 2014 535i x-Drive HVAC Not Working At All (Regardless of Settings); Blower Motor?

  1. #1
    Join Date
    Sep 2020
    Location
    Cortlandt Manor, New York
    Posts
    7
    My Cars
    2014 BMW 535i x-drive

    2014 535i x-Drive HVAC Not Working At All (Regardless of Settings); Blower Motor?

    Hi Folks, I have a 2014 535i x-Drive where my HVAC system just stopped working the other day. I've pulled the blower motor and removed the resistor but wondering if there's an easy way to bench test either of them or test the wires connecting to the unit (eg, is the blower even getting power, OHM specs, etc). Also, stupidly, I haven't checked the fuse(s) yet. Any thoughts on where I can get the fuse mapping? Thanks.

  2. #2
    Join Date
    Jan 2007
    Location
    .
    Posts
    7,708
    My Cars
    .
    To clarify, only the blower stopped working? Or the whole A/C control panel is dead and not working?
    ASE and BMW Master Certified Technician

  3. #3
    Join Date
    Sep 2020
    Location
    Cortlandt Manor, New York
    Posts
    7
    My Cars
    2014 BMW 535i x-drive
    Thanks for the reply, the A/C control panel has power and "works" as far as accepting input to change zones, settings etc, but the blower does nothing

  4. #4
    Join Date
    Jan 2007
    Location
    .
    Posts
    7,708
    My Cars
    .
    Should have replaced the blower motor at the same time as the regulator. Or at least tested it. You can test it by putting 12v directly to the blower motor wires. Black is ground, red is power.


    Sent from my iPhone using Tapatalk
    ASE and BMW Master Certified Technician

  5. #5
    Join Date
    Sep 2020
    Location
    Cortlandt Manor, New York
    Posts
    7
    My Cars
    2014 BMW 535i x-drive
    Sorry, I wasn't clear. I have not replaced anything yet. Was trying to test both the blower and the regulator. Further, wanted to test the harness connecting to the assembly if that's possible. I'll test the blower tonight. Thanks for the help

  6. #6
    Join Date
    Sep 2020
    Location
    Cortlandt Manor, New York
    Posts
    7
    My Cars
    2014 BMW 535i x-drive
    Sorry, I wasn't clear. I have not replaced anything yet. Was trying to test both the blower and the regulator. Further, wanted to test the harness connecting to the assembly if that's possible. I'll test the blower tonight. Thanks for the help

    - - - Updated - - -

    Tested the blower. Works fine. Tested the wiring harness in the car (brown and white/red) wires I believe. With the car running and blower on full I get 14 volts or so on white/red and 0 on what's grounded.

  7. #7
    Join Date
    Feb 2008
    Location
    orlando
    Posts
    56
    My Cars
    535i
    https://youtu.be/FtacsFs3_9Q


    Sent from my iPhone using Tapatalk

  8. #8
    Join Date
    Feb 2008
    Location
    orlando
    Posts
    56
    My Cars
    535i
    Just because blower motor is working doesn’t mean it’s good. Check the impedance and look for burning smell. See the above video. Mine failed but it worked for a long time before actually giving up.
    Also check for fuses in back trunk on top of battery module.
    Also check the resister for the blower motor.


    Sent from my iPhone using Tapatalk

  9. #9
    Join Date
    Sep 2020
    Location
    Cortlandt Manor, New York
    Posts
    7
    My Cars
    2014 BMW 535i x-drive
    Thanks for the post. There's no burning smell coming from the vents and the motor smells fine when running via a spare car battery. I Checked the motor and the impedance is fine. I suspect the resistor, but not sure how to check that. Thoughts?

  10. #10
    Join Date
    Jan 2007
    Location
    .
    Posts
    7,708
    My Cars
    .
    Buy one and replace it.
    ASE and BMW Master Certified Technician

  11. #11
    Join Date
    Sep 2020
    Location
    Cortlandt Manor, New York
    Posts
    7
    My Cars
    2014 BMW 535i x-drive
    Tested the impedance of the resistor when plugged back into the blower. The Power (red wire) shows open (non-zero) so perhaps that's the confirmation it's bad. Anyhow, I've ordered a new one and will report back.

  12. #12
    Join Date
    Sep 2020
    Location
    Cortlandt Manor, New York
    Posts
    7
    My Cars
    2014 BMW 535i x-drive
    Update. Finally received the resistor I ordered (seemed to be very hard to find with lots of out of stock). Anyway, purchased a new one from eBay and it worked!! Was really happy with that result. Appreciate very much everyone's help here.

Similar Threads

  1. Tune/Chip options for 2014 535i x drive
    By itsmeek in forum 2011-2016 (F10)
    Replies: 0
    Last Post: 08-05-2014, 11:15 AM
  2. HVAC not working right, please Help!
    By gtj735i in forum 1978 - 1987 (E23)
    Replies: 2
    Last Post: 10-28-2012, 08:51 AM
  3. HVAC not working?
    By heifetz17 in forum 1978 - 1987 (E23)
    Replies: 6
    Last Post: 09-10-2012, 05:49 AM
  4. 89 535i speedo and cruise not working
    By HipMusic man in forum 1988 - 1996 (E34)
    Replies: 1
    Last Post: 04-26-2012, 07:43 PM
  5. MY I drive does not work
    By kxmills in forum 2004-2010 (E60,E61)
    Replies: 7
    Last Post: 08-26-2008, 04:17 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •