I'm new to this site. I need help with hooking up my thermostat

[mikemathews]

Hi, I'm new here and I'm looking for help on hooking up a thermostat. I don't know where to go on this site to ask for help. I hope this is a good forum to start
Mike

 

[Oldgator73]

Was there a thermostat originally that was removed?

 

[kdbgoat]

Make, model, and year of your RV, along with make and model of your thermostat will help us help you.

 

[mikemathews]

It had a digital tstat and I'm trying to install the proper one. Its a dometic tstat. I have a atwood 8535 IV dclp furnace.

 

[mikemathews]

The new tstat is model # 3106995.032

 

[mikemathews]

I have a red yellow Orange and blue wire's for the air conditioning... I have to hook up for it to work

 

[Oldgator73]

What is the make and model of A/C? I found a wiring diagram for the t-stat but you probably already have that.

 

[kdbgoat]

If you do an internet search for your Atwood, you can download a free manual. It will have the wiring diagram in it. I tried to provide a link to the manual, but not that lucky. I have a nice download of it though.

 

[kdbgoat]

The same goes for a wiring diagram for the t-stat. My question is why get rid of a digital t-stat, and go back to an ancient analog? Is the digital not working? What model digital?

 

[docj]

It had a digital tstat and I'm trying to install the proper one. Its a dometic tstat. I have a atwood 8535 IV dclp furnace.

Had a previous owner, possibly, installed a residential digital thermostat to replace the original (awful) Dometic analog one?  I did that in my MH and the net benefit was huge. I didn't even bother to worry about providing a switch for the high fan speed; it wasn't necessary.  I'm using an inexpensive Honeywell that doesn't need a DC power supply so the lack of 24V isn't an issue.  It runs for > a year on two AAA batteries.

 

[Rene T]

I have a red yellow Orange and blue wire's for the air conditioning... I have to hook up for it to work

This is my thermostat and I think it's the same as yours.
https://www.amazon.com/Dometic-3106995-032-Analog-Thermostat-Furnace/dp/B00A2TDJ4I


I took the cover off and this is the way mine is wired:

7.5 is Red
Cool is Yellow
Fur is White
Hi Fan is Blue
Fan is Brown
Gnd is Green


Hope this helps.

 

[mikemathews]

Yes, that is my thermostat !
Thank you !
Someone ran new wires from ac and heater. So your colors wont match mine i have the colors off the a.c. factory that I need to know where they gp. Red yellow orange blue !
And I'm replacing the digital tstat because it's made for a house and won't run my heater! I wouldn't change something if it worked?

 

[mikemathews]

The old tstat ran my a.c. but not my heater I just bought this camper and now it's getting cold and I live in it full time !
I just went and bought a tstat from a locaol store a 2 wire and now my heat works so i will use the dometic on a.c. till I can figure all this out. I appreciate all the help. I've never had a camper before.
Thanks,
Mike.

 

[mikemathews]

It's a 1996 360 dutchman "36ft."

 

[Isaac-1]

Do as you please, though if it is a Hunter or Honeywell digital thermostat chances are it will operate your Attwood Propane furnace if it is wired correctly with no problem

 

[mikemathews]

It is a hunter but would not run my heat. But my heat work's. Now time to focus on the 4 wires for my a.c.

 

[Rene T]

Do as you please, though if it is a Hunter or Honeywell digital thermostat chances are it will operate your Attwood Propane furnace if it is wired correctly with no problem

He wants the T-stat to run his AC and the heat and that's his problem.The Dometic analog does do both operations.

 

[Isaac-1]

Rene, I am still not sure I see the problem here, I set up a Honeywell thermostat to operate my Dometic air conditioner / heat pump, along with my Suburban Propane furnace which originally came equipped with a Dometic / Duo-Therm analog thermostat.

It is set to first attempt to use the heatpump to heat, and if that is too slow to warm things up it fires off the propane furnace, if the temperature gets too low the heat pump kicks out and only the propane furnace runs.  If I am dry camping, then I set it to emergency heat, and it only runs the propane furnace.

In a way this is superior to the original analog thermostat as it automatically switches to propane if the temperature is too low for the heatpump to function.

 

[Bobtop46]

Analog Dometic T-stats used 7.5 volts control power vice 12 volt.  If that was removed and changed out to digital properly the control box in the ceiling below the AC would have had to be changed out.  Perhaps this is why the T-stat being replaced wouldn't run the furnace but would run the AC.  Sounds like a mismatch somewhere and going back to an analog will further confuse the issue. 
I would call Dometic with model and serial number of both the AC and furnace, and possibly numbers off the control box in the ceiling to understand what you have and where you need to go to get the system working properly.

 

[kdbgoat]

If one does an internet search on "using a Honeywell t-stat on an RV", you will get a lot of hits. It was a common thing to do before RV manufacturers started using digital.