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Possible failed MCU- AC won’t shut off

Discussion in 'Model S' started by Shadious, Jan 2, 2020.

  1. Shadious

    Shadious Member

    Joined:
    Jan 11, 2018
    Messages:
    374
    Location:
    Florida
    My main screen is black and the scroll wheels will not control any of the functions. The car drives and charges and I am waiting for a service appointment (2 weeks). Problem is that the AC is on and I can’t shut it off. It is set to 66 degrees and has been running nonstop for 36 hours. Any suggestions on how to get it to turn off? I tried both soft and hard reboots without any luck. The app won’t control the vehicle any longer. I am sure it is not good to run the AC constantly.
     
  2. ucmndd

    ucmndd Well-Known Member

    Joined:
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    Messages:
    5,961
    Location:
    California
    Let your battery die.

    Or, just show up at the service center. They’ll usually get you in for things like this.
     
  3. Akikiki

    Akikiki A'-Lo-HA ! y'all

    Joined:
    Nov 26, 2012
    Messages:
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    Pull the fuse? And for what its worth to you, I know of someone else that's going thru the same right now.
     
  4. kdday

    kdday Active Member

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    1,116
    Location:
    AZ
    Yes you can just pull the hv power loop and pull the 12v battery terminal so that the car has no power.

    I assume you've done a reboot attempt.holding both scroll wheels for 30 seconds?
     
  5. Shadious

    Shadious Member

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    Location:
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    Thanks- good advice on the service center. I am not super thrilled to have to drive 45 minutes with the car in its current state...
     
  6. Shadious

    Shadious Member

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    Location:
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    Yes- I have tried the hard reboot several times, not sure I did a 30 second hold, though. In the past it reset after about 10 seconds. I’ll try holding it longer to see if that works.
     
  7. Shadious

    Shadious Member

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    I was thinking that might be the only option. It’s a bummer for sure, crappy design. I knew it would eventually fail, but was hoping to swap for MCU2 if it actually be some a reality.
     
  8. Shadious

    Shadious Member

    Joined:
    Jan 11, 2018
    Messages:
    374
    Location:
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    I am fairly new to the car, where would I find the HV power loop?
     

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