Question about Coleman Mach III Air Conditioner

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Air conditioner and heater come on by itself

Our Coleman Mach has a remote control to operate it. The heater will come on at odd times without us turning it on and the air conditioner will also come on unexpectedly. The does not appear to be a manual off switch on the unit.
It could be 80 degrees inside and the heater is set at the lowest setting and it comes on.

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  • lissel3 Aug 16, 2008

    We are not sure if grandchild messed around with the buttons on the remote but when we set it to where we usually do the heater comes on even when we think it is "off" If we turn the remote off how does the heater come on by itself?

  • Anonymous Dec 05, 2008

    furnace will come on when unit is turned completely off, also when

    temp outside is warm and heat therostat is low (60"s}

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  • Coleman Master
  • 6,674 Answers

Has anything been changed since it last worked well or normal? Thermostat ?

Posted on Aug 16, 2008

  • Mike Butler
    Mike Butler Aug 16, 2008

    Have you tried removing batteries in remote, if it has them. If so, leave them out for a minute or so, and try again. You should go to your manual for remote and check procedures for setting it up & what happens after power off. I think it is all explained in there.

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