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Dometic Mechanical Thermostat - Furnace Control Only - White

Dometic Mechanical Thermostat - Furnace Control Only - White

Item # DMC54FR
Our Price: $35.92
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Dometic Accessories and Parts - DMC54FR

  • RV Air Conditioners
  • Thermostat
  • Dometic

  • Dometic RV furnace thermostat
  • Controls the heat temperature from your RV's furnace
  • Reliable mechanical controls help with fuel efficiency

9108860312 Dometic Mechanical Thermostat - Furnace Control Only - White

Video of Dometic Mechanical Thermostat - Furnace Control Only - White

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Dometic RV Air Conditioner Parts - Mechanical Furnace Thermostat - DMC54FR

Ellen: Hey everybody. I'm Ellen here at and we're taking a quick look at the Dometic mechanical thermostat. Now this is just for your furnace. So it's just going to control the heat in your RV. But this gives you an easy way to do that and connect it into your Dometic system. So if we pop off the cover, we can actually get a look at the system.

It should be pretty simple to get this installed. You do need to supply your own mounting hardware. It doesn't come with any screws for that. So that is one thing that I want to mention, but other than that should be again, pretty simple. So you can just pop off that cover by pulling out on the corners, and then you can see the mechanism inside there.

So again, this is a mechanical device, so there's not a whole lot to it as far as working or moving parts.So the main thing we want to do is look at your old thermostat to determine where the anticipator, which is this little metal piece right here should go. If you don't have it, or you can't find where that was before, they suggest that you set it to about 0.5, there are a couple of little numbers etched in here. So over here at the outset, it's about 0.1 and then we've got 0.4 and then we have 1.0. So I'm going to set it to about a little past 0.4, just since that's the number that they give you. Or you can also check on your furnace to see if there's any setting there, but the best way to do it is to just check with what you had before, if you had a thermostat before in your RV.

So once that's set, you then drill out some holes using the mounting holes here to find your placement.This one does have a little elongated shape so that you can get this nice and leveled off and then tighten everything down. The two wiring connections that you have to make will be on the back. So they are labeled R and W for red and white. Red would be your power. White would be your ground.

As far as actually making any adjustments to the temperature, it's just going to be pretty simple. It's that little slider at the bottom. So actually I'll leave this off so you can see that mechanism at work. So if we slide this over to colder, it's going to keep that connection separate. But if we want to warm it up a bit, once we get past our current temperature, it's going to engage that plate to kick our heat on. So that's basically how that works. It's just like once we get down below, it'll kick off and vice versa. That's pretty much all there is to it. We also have the little switch to just turn on and off the system overall. So this just snaps back on.I'll give you a couple of measurements just for reference as far as how big this thermostat is on the wall. So from the back, because it has a little bit of a taper to it. So, it's about 3 1/8" by about 3 3/4" with those tabs coming up on either side for your on-off and the temperature adjustment. And then it's about an 1 1/2" inaudible 00:03:20 an 1 3/8" thick.It does come with instructions that do a fair job of walking you through it. They're not super detailed, but again, it's a pretty simple process and that's pretty much all there is to it for our quick look at the Dometic mechanical thermostat. I hope that this has been helpful inaudible 00:03:40 if this is the right part for you. We have a lot of accessories for your RVs, motor homes and more here at So be sure to check them out and thanks for watching..

Customer Reviews

Dometic Mechanical Thermostat - Furnace Control Only - White - DMC54FR

Average Customer Rating:  4.8 out of 5 stars   (9 Customer Reviews)


You guys (and girls) at etrailer are really good, trustworthy and considerate to us customers. Too bad every company cannot do business exactly like you!!


Came in two days early. Sturdy construction. Stronger than what came with the trailer new.


Look good






See what our Experts say about this Dometic Accessories and Parts

  • Camco RV Heating Wall Thermostat for Heat Only
    The heat side of most all units are able to be controlled by an external input as they operate by simply receiving a signal of when to turn on/off. I suggest you consider the Dometic Mechanical Thermostat - Furnace Control Only, # DMC54FR. Please note the attached product review video.
    view full answer...
  • Replacement Thermostat Recommendation for Suburban Furnace on Motorhome
    Since you're only wanting to control the heat on your Suburban furnace you'll want to use the Dometic Mechanical Thermostat # DMC54FR. This is one of the analog thermostats you were looking at and the reason this is what I recommend is because it's the only thing that is compatible - the digital options are designed to work with specific systems which is why they won't work for your application. Attached is a review video for you to check out.
    view full answer...

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Info for this part was:

Employee Kathleen M
Installed by:
Kathleen M
Employee Amanda M
Edited by:
Amanda M
Employee Adam Y
Written by:
Adam Y

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