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Open Roads Forum  >  Class C Motorhomes  >  Class C

 > Replacing thermostat for gas furnace only

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VA-Apraisr

glen allen, VA

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Posted: 12/06/18 02:37pm Link  |  Quote  |  Print  |  Notify Moderator

Have a 2003 Fourwinds with the old style wall thermostat with the hard on/off switch and temp adjustment below with just bars (no numbers). On several occasions, the furnace will start and heat up camper but won't continue to keep comfortable. Would have to get up and bump it on and sometimes it would stay on then not work again an hour later (sleepless nights). Any suggestions on replacing it with a more modern unit? This only works the propane furnace ( have a separate ceiling a/c unit with manual knob adjustment). Thanks!

2oldman

Salton Sea

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Posted: 12/06/18 03:05pm Link  |  Quote  |  Print  |  Notify Moderator

Some ideas.

Many of us have done this.

ROBERTSUNRUS

Salem, Oregon

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Posted: 12/06/18 10:51pm Link  |  Quote  |  Print  |  Notify Moderator

[emoticon] Hi, one of the best things that I did for my trailer was to install a digital thermostat for my furnace. Find the simplest one that you can. Mine has controls for the air conditioner too and they don't get used because I have a manual air conditioner like you have.


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naturist

Lynchburg, VA

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Posted: 12/07/18 10:42am Link  |  Quote  |  Print  |  Notify Moderator

Go to Lowe’s or Home Depot and buy one of the cheaper thermostats for home use. Nobody needs 7- day programmable internet access for a camper. The cheapest home thermostat just needs to close the circuit when the set temperature is reached and open the circuit again a degree or two warmer.





rrupert

NW PA

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Posted: 12/07/18 11:49am Link  |  Quote  |  Print  |  Notify Moderator

naturist wrote:

Go to Lowe’s or Home Depot and buy one of the cheaper thermostats for home use. Nobody needs 7- day programmable internet access for a camper. The cheapest home thermostat just needs to close the circuit when the set temperature is reached and open the circuit again a degree or two warmer.


I agree, a digital non-programmable is all you need.


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VA-Apraisr

glen allen, VA

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Posted: 12/07/18 02:14pm Link  |  Quote  |  Print  |  Notify Moderator

Will do..........thanks as always!!

BFL13

Victoria, BC

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Posted: 12/08/18 04:49pm Link  |  Quote  |  Print  |  Notify Moderator

Had those symptoms, got the digital thermostat, furnace still does that. It is more to do with the burner and ignition.

After some efforts there, it mostly cycles ok, but once in a while just blows cold air and you have to shut it off, wait till fan stops, turn it on and after fan starts wait for the boom when it comes on properly.

It has nothing to do with the thermostat in our case. Might in your case, but don't be surprised if that doesn't solve everything.


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VA-Apraisr

glen allen, VA

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Posted: 12/08/18 05:55pm Link  |  Quote  |  Print  |  Notify Moderator

Well, hoping for the best! Mine sees alot of beach use and think the spring in the old thermostat has rusted up some because when I move it back and forth a few times, it normally starts working ok again. But, if not, will certainly look at the igniter. Only cost $22 for the cheapo new unit from Lowe's. Thanks!

ronfisherman

SE Michigan

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Posted: 12/09/18 03:32am Link  |  Quote  |  Print  |  Notify Moderator

While looking at the igniter. Check the connection on furnace control board. I needed to use some contact cleaner on the board where a wire connector attaches to the board.


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VA-Apraisr

glen allen, VA

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Posted: 12/12/18 07:33am Link  |  Quote  |  Print  |  Notify Moderator

Ok, got a Honeywell RTH111 non-programmable termostat.....question: It has 8-wire pins on back labeled "B,O,G,Y,W, R, Rc" and don't know which to hookup the red or white wires coming from my old thermostat. Anyone know which to use? As usual, the diagrams on instructions are almost impossible to understand. Trial and error should give me the answer, but thought I'd ask beforehand. Thanks!

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