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CWDoc115's avatar
CWDoc115
Explorer
Feb 22, 2017

Thermostat issues

1999 Winnebago Adventurer 32T
Thermostat is a Coleman Mach

Thermostat started having problems over the weekend. The AC will not work, neither will the heater but the fan works fine.

Anyone have the problem & what was the cure?

Thanks in advance for your help! :h
Class A
  • DrewE's avatar
    DrewE
    Explorer II
    Feb 25, 2017
    The air conditioner fan on (and fan speed) switch doesn't need power to operate. The rest of the thermostat functions probably do. I would check the 12V supply and ground at the thermostat (which would be two of the wires from the air conditioner).
  • CWDoc115's avatar
    CWDoc115
    Explorer
    Feb 25, 2017
    I checked the breakers, they seem fine. The heater does not work, & the fan in the overhead AC unit will work when the Tstat is set to fan, but when the switch is moved to AC it shuts down. I'm totally confused....
  • crasster's avatar
    crasster
    Explorer II
    Feb 23, 2017
    Go over everything from power outlet, breakers, and plug ins (is it plugged or hard wired?) Then gently pull the t-stat and verify wires.
  • Mandalay_Parr's avatar
    Mandalay_Parr
    Explorer
    Feb 23, 2017
    Did you check all fuses and circuit breakers?
    Was there some event just prior to it quit working?
  • path1's avatar
    path1
    Explorer
    Feb 22, 2017
    CWDoc115 wrote:
    Anyone have the problem & what was the cure?


    With mine...I pulled the t-stat and noticed a wire was broken at a spade connection that hooks on the back.

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