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aw2055989's avatar
aw2055989
Explorer
Jun 07, 2015

AC Analog Control Box

2009 Coachmen Mirada 310DS. Duo-Therm Rooftop ACs. Front AC works fine, rear AC doesn't turn on, it's as if it has no power. Breaker is fine. Worked yesterday, won't start up today. Doing some troubleshooting. There is a fuse in the Analog Control Box that I want to check. Does anyone know where the Analog Control Box is located? Thanks.
Class A

2 Replies

  • aw2055989's avatar
    aw2055989
    Explorer
    Jun 07, 2015
    Well, new twist. Rear AC working yesterday on generator power. Last night would not work on generator power, only front air would. Also, my GFCI circuit which includes the bathroom and kitchen as well as the microwave wouldn't work either on generator power. Hooked it up to shore power today and all worked fine. I don't even know where to start with that deal.
  • dougrainer's avatar
    dougrainer
    Nomad
    Jun 07, 2015
    It is mounted above the return air grill IF your return is mounted below the AC unit. It is in a 8 inch square silver metal box. FYI, I have rarely found that fuse blown. It is usually the supply fuse TO that box at the main 12 volt fuse center that is the problem. Have someone turn that AC On and OFF and you stand under it. IF the fuses are OK you will here clicking sounds when the wall tstat is going on and off. Doug

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