Thermo King C600 not cooling

Discussion in 'Refrigerated Trucking Forum' started by xiaoqixx1, Jun 6, 2024.

  1. xiaoqixx1

    xiaoqixx1 Bobtail Member

    17
    4
    Jul 7, 2012
    0
    ETV good, TXV just replaced, compressor good, Freon good.
    I got C600 unit, its not cooling, when start the unit ETV start raise until around 180, temperature difference around 6F-7F. But when the motor start run at high speed ETV start drop and stay around 20-30. temperature difference only 2F.

    Currently known issues: Water temp sensor get random numbers, jump from 100 to 250 or no reading. (The dealer said they used wires to connect the motherboard directly to the sensor and get same result, even with new sensor)

    Now they think there is something wrong with the motherboard and needs to be replaced, the unit does not have any error codes, is there any other possible way may cause this problm?
    I know ETV can work reverse, maybe a god knows reason the ETV got short circuited and start work reversely?
     
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  3. reeferwrencher

    reeferwrencher Medium Load Member

    554
    1,470
    Aug 4, 2018
    0
    High speed rpms are likely too low,this causes etv to close to take the load off the engine.Emission system crap.Welcome to the new technology where TK will sacrifice your load of ice cream to get that coveted green sticker.
     
    sirrepairsalot Thanks this.
  4. abyliks

    abyliks Road Train Member

    3,269
    7,317
    May 2, 2010
    ludlow MA
    0
    Generator #### the bed on my 700, would cool on low speed but not enough amps on high speed

    it’s getting ripped off this week to put a 210 thar I have on
     
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