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Thread: X13 motor constant run!

  1. #21
    Join Date
    Dec 2002
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    Arizona
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    I know you said it runs on any 24v tap, but does it change speeds as you do this?
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  2. #22
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    Jan 2012
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    Missouri, USA
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    I have had problems with nest stats that have switches in the sub base.

  3. #23
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    Nov 2004
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    Anchorage Alaska / Seattle WA
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    Whatever is controlling your motor has failed.... either the fan relay has welded closed or the board scr has failed shorted.

  4. #24
    Join Date
    Jul 2012
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    Ashland, VA
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    I was doing a startup on a Carrier system once, fan motor would run constantly. Easy solution, the plug on the board was connected backwards. I flipped it around the right way and everything worked perfectly.

  5. #25
    Join Date
    Dec 2019
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    Hi Mason, I am having the same "x13 motor constant run" issue here. It is a 230VAC x13. I pulled off all speed tabs, pulled off C tab, leaving ONLY L-115V, G-0V, N-115V, and the motor still runs. I have previously checked the thermo switch, checked heat sequencer, checked fan relay, before I narrowed it down to the motor lol. I think my last resort is to replace the ECM head, but I wonder if I am missing anything that I can try. BTW, the ECM head looks perfect inside, capacitors, rubber seal, etc. Thank you very much.

  6. #26
    Join Date
    Dec 2019
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    Hi Random, which plug or board are you referring to here? Thanks.

  7. #27
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    May 2014
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    Do you guys know how old this thread is?
    I do a triple evac with nitro to remove non condensables.

  8. #28
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    Jan 2012
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    Missouri, USA
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    3 year old thread. Replace the motor. Next time start a new one.

  9. #29
    Join Date
    Dec 2020
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    Quote Originally Posted by Nemo View Post
    Hi Mason, I am having the same "x13 motor constant run" issue here. It is a 230VAC x13. I pulled off all speed tabs, pulled off C tab, leaving ONLY L-115V, G-0V, N-115V, and the motor still runs. I have previously checked the thermo switch, checked heat sequencer, checked fan relay, before I narrowed it down to the motor lol. I think my last resort is to replace the ECM head, but I wonder if I am missing anything that I can try. BTW, the ECM head looks perfect inside, capacitors, rubber seal, etc. Thank you very much.
    Payne PY3G unit, August 2013 vintage.

    Found this thread with the exact same problem I am having. So responding rather than starting a new thread.

    I thought I was going crazy. I tested voltage on all the connections on the board and nothing I could do, short of removing the line voltage connector would shut down the motor.

    I finally cut the power, removed the low voltage connector so there was absolutely no chance of any inputs from the control boards being applied to the fan motor and restored power to the unit. The fan started on its own.

    I'm sure somebody thinks having electronics built into the motor is a good idea, but I like to keep things simple. I hate the thought of a new motor, but it's about as cost effective as just replacing the electronics on a 7 year old unit.

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