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stevenal's avatar
stevenal
Nomad II
Jul 11, 2018

AC working right?

My new camper came with a Coleman Polar Cub 9.2.

It got a bit warm here today, so I tried it out. I noticed that even with the control turned to the cool limit, the compressor still cycles off. I just timed it at 1.5 m on and 3 m off and the air in the camper still feels warm. Is this normal? Is there a maximum duty cycle built into the control? Or is the control sensing the cool air in the vicinity of the unit and switching off. All control is on the unit. What's your experience? Thanks.
  • SoundGuy's avatar
    SoundGuy
    Explorer
    Jul 11, 2018
    wildtoad wrote:
    One other thing to look at is if an air outlet is blowing directly on the thermostat.


    It's hard to imagine a truck camper would have anything but a direct blow A/C with the thermo mounted on the unit itself as part of the ceiling unit. :R
  • wildtoad's avatar
    wildtoad
    Explorer II
    Jul 11, 2018
    One other thing to look at is if an air outlet is blowing directly on the thermostat.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Jul 11, 2018
    No it is NOT working correctly

    Compressor should NOT cycle on/off until temp set point has been reached
    When compressor shuts down the 3M is needed for high pressure side to equalize before compressor starts again

    Sounds like unit is 'freezing' up.

    Is it humid where you are?
    Are you running A/C Unit on HIGH Cool?
    Is air discharge Cold?

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