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Thermo King S 600 HELP

Discussion in 'Refrigerated Trucking Forum' started by hendrix69, Sep 14, 2025.

  1. Sep 14, 2025 #1
    hendrix69

    hendrix69 Bobtail Member

    44
    7
    Jun 4, 2025
    0
    Hi friends just realized that Temperature Differential shows on -7degrees.i did manually defrost and it rose to 7degrees but it backed to -7degrees again. I am open to any advice. Thank you! IMG_5377.jpeg unit set on 33 degrees continuously btw.
     
    hendrix69, Sep 14, 2025
    hendrix69, Sep 14, 2025
    #1
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  3. Sep 14, 2025 #2
    WesternPlains

    WesternPlains Road Train Member

    6,314
    55,223
    Sep 1, 2017
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    Looks like you gotta take it to a Thermo King dealer repair shop. Probably an easy fix.
     
    WesternPlains, Sep 14, 2025
    WesternPlains, Sep 14, 2025
    #2
  4. Sep 14, 2025 #3
    hendrix69

    hendrix69 Bobtail Member

    44
    7
    Jun 4, 2025
    0
    The reason I'm asking for support here is because maybe there's something I can fix myself.I know to take it to the repair shop already but thanks anyway
     
    hendrix69, Sep 14, 2025
    hendrix69, Sep 14, 2025
    #3
  5. Sep 14, 2025 #4
    reeferwrencher

    reeferwrencher Medium Load Member

    591
    1,523
    Aug 4, 2018
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    If the box is at setpoint dont worry about it.
     
    reeferwrencher, Sep 14, 2025
    reeferwrencher, Sep 14, 2025
    #4
  7. Sep 14, 2025 #5
    hendrix69

    hendrix69 Bobtail Member

    44
    7
    Jun 4, 2025
    0
    Yes it is. Thank you brother
     
    hendrix69, Sep 14, 2025
    hendrix69, Sep 14, 2025
    #5
    reeferwrencher Thanks this.
  8. Sep 15, 2025 #6
    OlegMel

    OlegMel Medium Load Member

    506
    843
    Apr 8, 2023
    0
    Looks like settings are stuck on previous load? I’d disconnect the battery for 15 minutes and try again.
     
    OlegMel, Sep 15, 2025
    OlegMel, Sep 15, 2025
    #6
  9. Sep 15, 2025 #7
    hendrix69

    hendrix69 Bobtail Member

    44
    7
    Jun 4, 2025
    0
    Nope because previous load was 70 degrees but i can still try it if it helps
     
    hendrix69, Sep 15, 2025
    hendrix69, Sep 15, 2025
    #7
    OlegMel Thanks this.
  10. Sep 16, 2025 #8
    reeferwrencher

    reeferwrencher Medium Load Member

    591
    1,523
    Aug 4, 2018
    0
    If it's on continuous mode and it's near or at setpoint the temperature differential always drops because it goes into modulation and cooling slows down to maintain setpoint.
     
    reeferwrencher, Sep 16, 2025
    reeferwrencher, Sep 16, 2025
    #8
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