Question about Dometic Rooftop RV Air Conditioner

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I have a rooftop dometic A/C With heat strip. Unit is controlled with a two button ceiling mounted selector control or a remote control. there are no selection controls on the adb box. Unit does not respond to either control. Can this be over rode and is the control module and remotes matched where they must be purchased as a matched set?

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  • smchartier Feb 07, 2010

    Yes it worked before, it was shut down and a week later it would not come on. Nothing happens not even the fan.
    The only numbers provided by client via telephone are control box part #3308448-020 serial #CS100819 for models 579 & 595

  • smchartier Feb 07, 2010

    Power is confirmed to the control box. There is no wall mounted thermostat, unit is controlled by the remote control only.

  • smchartier Feb 07, 2010

    It is a dometic remote, unsure if it has a docking station, I will have to re-contact client and find out and get back to you at another time. Was told by my local part supplier yesterday that the remotes are matched to the control box and both would have to be purchased as a set. I have no literature on these type of units. At this time I only have Part#3308448-020 and serial#CS100819 which is for the control box.
    Thanks

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  • Dometic Master
  • 6,674 Answers

First thing I need to ask is , are you sure, it has the strip, or coil, and did it work before? Did you actually remove ceiling cover and see it in there? The reason I ask is that it is very common for someone to tell you it has it, but it actually has the option, but no coil installed, or lower control box is wrong one. Also, once that's confirmed, could you give me the model #'s off the base of the upper unit, as well as the numbers on the control box?
Obviously the cover inside will need to be removed to do all this.

Posted on Feb 07, 2010

  • 2 more comments 
  • Mike Butler
    Mike Butler Feb 07, 2010

    Obviously they need to confirm AC power is getting to control box, (checked breaker etc.) Then if that is confirmed, does thermostat have fuses (internal) that they can check ? Can they hear anything at all from AC unit, like maybe just a "hum" when they turn just fan on?

  • Mike Butler
    Mike Butler Feb 07, 2010

    Is there not a base, or docking station for that remote? Is it dometic remote, or other brand?

  • Mike Butler
    Mike Butler Feb 07, 2010

    The main reason I'm asking is that some of them were so problematic, that they stopped selling them, as well as dealers refused to install them. Most change to something more reliable, and user friendly.

  • Mike Butler
    Mike Butler Feb 07, 2010

    Try, (www.dometicusa.com ) and check customer support for manuals etc, that may help. Yes the control/thermostat usually has to be matched to control box. The biggest problem some have, is that the wiring harness from wall thermostat to control box, isn't there, which means, lot's of work, to get one to it. Maybe if owner can send you a digital picture of remote, it can be better identified for your research.

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