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Wardster's avatar
Wardster
Explorer
May 05, 2016

New Digital Thermostat

Like most of the TC's out there, my Northern-Lite has a propane forced air furnace and a roof top air conditioner. As detailed in the pic below, the Atwood unit in my NL came with a thermostat that doesn't really allow you to accurately set the thermostat to a specific temperature.



After doing a little research, I found a digital replacement for units with just heat - see below.





The first step was to remove the existing thermostat. The cover popped off and the base was held to the wall with two screws that I removed.





As you can see in the picture above, my Atwood had two wires on the thermostat, a white one and a black one. The white wire was connected to the 'W' and the black wire was connected to the 'R'. I made a note of this since I would attach the wires to the new thermostat the same way.

After disconnecting the wires, I removed the backing plate from the new thermostat and attached the white and black wires to the new terminals before attaching it to the wall.



I installed the provided batteries into the new thermostat, then attached it to the backing plate. After a quick test, I confirmed that everything works according to plan, so my days of playing the thermostat temperature game are over. It will be nice to simply set it and forget it like a Ronco Showtime Rotisserie.

  • The original Atwood thermostat sucks. Not only can you not set it at a specific temperature, it is quite sensitive as to where exactly you set it. They make a digital one that they use for their two speed furnaces (it also controls aircon), it is powered from the furnace, but it is unreasonably priced as a separate item.

    Most home type thermostats were designed to be powered from 24VAC (standard control voltage for home HVAC) if not batteries so I don't know how they would do on 12VDC.
  • That looks pretty good. Do they have programmable ones as well?
  • I made same switch and have been pleased with the change. Not sure what the battery life is --- change mine out once a year when I put new batteries in the various alarms.
  • Photomike wrote:
    I was planning on doing the same thing then thought again about it that it was just another battery to monitor so I did not run it dead at -30.

    To bad you could not get it to pull from the camper battery, yes another phantom draw but at least if you had 12v in the camper the thermostat would still work.

    On Edit: That one may be able to run with power from the camper if that is what the C is for.


    I keep an assortment of batteries in the TC, so I'm not concerned if the two AA batteries need replaced in the thermostat. I will say that I would definitely hook it up to the existing 12V system had there been a third wire in the wall.
  • I was planning on doing the same thing then thought again about it that it was just another battery to monitor so I did not run it dead at -30.

    To bad you could not get it to pull from the camper battery, yes another phantom draw but at least if you had 12v in the camper the thermostat would still work.

    On Edit: That one may be able to run with power from the camper if that is what the C is for.