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APU thermoking keeps blowing F11 fuse condenser fan 25amp fuse

Discussion in 'Experienced Truckers' Advice' started by streetfloater, Apr 1, 2024.

  1. Apr 1, 2024 #1
    streetfloater

    streetfloater Bobtail Member

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    Apr 1, 2024
    0
    Hello I am having issues with my apu not blowing cold air it will turn on for a couple of minutes then I get the orange triangle light then eventually the apu turns off. I realized the fan connected to my apu outside of my truck doesn’t turn on. And noticed the fuse corresponding with the fan which is the F11 fuse for the condenser fan (25amp) was blown. I replaced the fuse turned the unit off unplugged everything but that fuse again blew. Has anybody had this issue? Please help if you can, thanks
     

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    streetfloater, Apr 1, 2024
    streetfloater, Apr 1, 2024
    #1
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  3. Apr 1, 2024 #2
    Moosetek13

    Moosetek13 Road Train Member

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    Burnsville, MN
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    Maybe the fan turns on but is frozen in place, so the fuse blows.
    Maybe replace the fan and see if that helps?
     
    Moosetek13, Apr 1, 2024
    Moosetek13, Apr 1, 2024
    #2
  4. Apr 3, 2024 #3
    RunningAces

    RunningAces Road Train Member

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    Jul 2, 2017
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    Check the cord, might have vibrated a hole into it and now it's blowing the fuse.
     
    RunningAces, Apr 3, 2024
    RunningAces, Apr 3, 2024
    #3
    shatteredsquare Thanks this.
  5. Apr 4, 2024 #4
    shatteredsquare

    shatteredsquare Road Train Member

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    that fan pulls more to startup than 25 amp, put a 30 in and stay cool
     
    shatteredsquare, Apr 4, 2024
    shatteredsquare, Apr 4, 2024
    #4
  7. Apr 4, 2024 #5
    shatteredsquare

    shatteredsquare Road Train Member

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    middle dirt
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    I just replaced my condenser fan cause it was frozen stiff in like 15 degrees of travel, the other 345 degrees it would spin. motor housing was swelled up and cracked open like a leaky battery. went to change the fuse knowing it was blown too. it wasn't blown!? how tf not, idk. maybe not shorted, just buzzer mode
     
    shatteredsquare, Apr 4, 2024
    shatteredsquare, Apr 4, 2024
    #5
  8. Apr 4, 2024 #6
    shatteredsquare

    shatteredsquare Road Train Member

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    May 23, 2014
    middle dirt
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    I swear to god there is probably a billion dollars of maintenance labor hours every year spent to rectify holes worn in little 12v wires in mystery places the sun don't shine that could be 100% mitigated by 50 cents worth of conduit and zip ties 5 years before hand
     
    shatteredsquare, Apr 4, 2024
    shatteredsquare, Apr 4, 2024
    #6
    RunningAces Thanks this.
  9. Oct 28, 2024 #7
    Alan080582

    Alan080582 Bobtail Member

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    Oct 28, 2024
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    Dude how did you solve this problem I have exactly the same problem
     
    Alan080582, Oct 28, 2024
    Alan080582, Oct 28, 2024
    #7
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