Forum Discussion

gonewildtraci's avatar
gonewildtraci
Explorer
May 30, 2018

Dometic 5 CCC...Is it dead?

A/C was working fine, then we turned it off to use the microwave. Went to turn it back on, and nothing. Doesn't light up, doesn't do anything. Tried the reset, still doesn't light up, barely could make out Med on the display. Have no idea what the means. And still nothing. Left if off for a few hours, still dead. We live on SMALL fixed income. Any help would be much appreciated.
Class A
  • dougrainer's avatar
    dougrainer
    Nomad
    May 30, 2018
    5 button is 12 volt powered and is powered by the Zone 1 AC control board. Very rare for a CCC tstat to just go dead or have low display lighting. Odds are the Communication cable from the Tstat to the front AC has corroded ends, and odds are it is at the AC unit where the COM cable connects. The COM cable looks like a standard Telephone 4 wire cable, but is wired backwards from a telephone cable. You do not state how old the system is or what model roof AC you have. Can you get that. Doug
  • 1995brave's avatar
    1995brave
    Nomad
    May 30, 2018
    Does the microwave still work? You may have a tripped Ac breaker. Turn all breakers off and back on again.
  • Ivylog's avatar
    Ivylog
    Explorer III
    May 30, 2018
    The telephone type connectors often need cleaning...take on/off several times. There is a 12V fuse somewhere that provides the power to the Tstat ...should be one of the ones on your converter. good luck

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