Dometic digital thermostat

[time2roll]

Been wanting to go with a digital thermostat but I was not very excited about using the battery powered home units for the conversion. Then found out Dometic has a new thermostat and control board.

So if you have this thermostat:



And you want something like this:
(I fixed those extra holes BTW)



Here is the kit:

Dometic Single Zone LCD Control Kit w/ Thermostat White 3313189.000 $75

Here is the kit pictured:

clockwise from top left. freeze sensor, spade terminals to crimp onto your furnace control wires, wall thermostat, mounting screws, control box, wire harness.



This is the old box up in the air unit



Here is the new box. Much smaller should also allow better air flow through the inlet filter.



Old box with the gaggle of wires. Actually fairly simple.

Paired white/black are 12v supply.
Blue/white is control connection to furnace.
Yellow is 120v power bundle.
Black to the left is the freeze sensor.
Brown is the bundle from the old thermostat.

Everything is either cut or disconnected to remove the old box.



New box connected to romex



The kit comes with a wire harness to connect to 12v and the thermostat cable. Only three wires are used for the new thermostat. 12+, 12-, & one control wire. I used Red, Black, Orange as that matches the harness.

This is the new box with snap connectors:



The heater control wires connect to the two spade terminals on the left. Thermostat control harness snaps into the four pin middle connector. Freeze sensor on the two pin connector to the right. Romex goes in at the far right. Power and control to the air conditioner uses oem harness that plugs in on the back side.

Worked perfect right out of the box. Well OK I had to buy some spade connectors as the oem wire to the furnace was a larger size. And some crimp connectors (not included) to connect the 12v thermostat harness.

Here is the user manual for those that want more operating details:
Dometic single zone digital operating instructions


Inspired by member BuffaloIndian in this thread:
Anyone Replaced Dometic Thermostat: Analog to Digital?

[time2roll]

I don't know. Do you have multiple air conditioners etc?
Best to call for assistance to verify what you have and what you need.

Or send a message to member Chris Bryant or dougrainer for comment.

[olskool]

Not sure if it matters, but there 2 other thermostats in the travel trailer. One up front in kitchen and one in the back bedroom. I don't care if those work or not. Will that matter?

[time2roll]

The link on page 1 goes to the new Comfort Touch and I believe that is the correct kit that you need for just air and furnace.
Heat strip, heat pump, blue tooth, are different.

[olskool]

I think this worked. Here's a picture of the control unit.

[time2roll]

I have now replaced the original single zone thermostat with the Comfort Touch single zone.

This is the new one I ordered adventurerv.net Thermostat only. Control box is separate if needed.



The original had an always on annoying LED indicator light. This new one goes dark after a short delay. Much better for me as mine is mounted right next to my bunks.

[BarneyS]

olskool wrote:
Snip... If I could figure out how to post pictures......

https://flic.kr/p/Tj2ucj

Read the first post in this thread and follow the directions. It is really very simple.

1. Upload your picture to the site given in that post.
2. Copy the resulting URL.
3. Paste the URL into your post here without adding anything or subtracting anything from the URL you go.

Your picture will now appear in the post and will be properly sized for use on our forums.
Good luck.
Barney

[westend]

See if this works:

[olskool]

Digging up this old thread. I have the analog set up in my 94 Holiday Rambler and the t-stat has failed. I read through the topic and the kit that was linked on the first page is that what I need or are there others depending on what I have. If I could figure out how to post pictures......

https://flic.kr/p/Tj2ucj

[RE_Todd]

Great write up. Used your instructions to install mine. Perfectly understandable. Thanks

[Toxed2loss]

Sorry its taken me so long to get back. I though I was having trouble uploading pics from my iPad and I'm rarely on the desktop. Turns out I can't figure out how to upload them from here either. :R Here's what I figured our: Dometic pkg'd the wrong thermostat and electronic control box with the Heat Pump thermostat. They sent us a replacement. It went together, with no "which wire, where?" questions after that. The small paired red wire hanging down from the unit is to the outside temp sensor. Its only on Heat Pump models. It plugs in next to the clamp.

[time2roll]

This should be the manual:

See pg 11 for wire diagram

Is it the Orange wire? IIRC it was Orange and red stripe that might seem double red.

Could it be an outdoor temp sensor?

[Toxed2loss]

Great post! I'm just replacing my old A/C with a Brisk II Heat Pump and the same digital Tstat. This thread is excellent for sorting out the wires, but I have this double red wire, with a clip hanging down from the HP and I'm not sure where it goes. It doesn't seem to match anything. Anyone know?

[Fisherguy]

gmc6000 wrote:
I installed this one. Keep it simple.

RV Thermostat

What type (what brand) furnace and AC do you have?

[gmc6000]

I installed this one. Keep it simple.

RV Thermostat

[compint]

Just completed this upgrade as well. I like that it is still factory and takes advantage of the digital signal. Thanks so much to smkettner for the assistance along the way.