I need HELP!!!: Furnace always turning off

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Furnace always turning off

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Forum Name: I need HELP!!!
Forum Discription: Perplexed/need help with a problem - ask here
URL: https://www.rpod-owners.com/forum_posts.asp?TID=15114
Printed Date: 22 May 2026 at 11:43am
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Topic: Furnace always turning off

Posted By: traveleric
Subject: Furnace always turning off
Date Posted: 23 Jan 2022 at 6:09pm

Hello everyone and happy new year.

I have a 2017 178 that I recently purchased used and am on one of my first trips getting to learn all I can.

One of the main things I am not figuring out is what seems to be an issue with the furnace.

First, let me say when the furnace is running it works very well cranking out the heat.

That said, I believe 100% of the time, when it first goes on, heats up the Rpod meeting thermostat temperature it turns off (expected) to never go on again (unexpected) UNLESS I manually flip the on/off switch off then back to on again. Every single time, something is triggered where I have to do this any time I want to run the furnace to warm this beauty up.

Any ideas?

Thanks very much,

Eric

Replies:

Posted By: jato
Date Posted: 23 Jan 2022 at 6:42pm

What style thermostat do you have? Is it a simple analogue with a slide lever at the bottom or a digital that is also tied to the A/C? From your description it would seem like a thermostat issue, not furnace since once it is running it performs as it is supposed to.

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God's pod
'11 model 177
'17 Ford F-150 4WD 3.5 Ecoboost
Jim and Diane by beautiful Torch Lake
"...and you will know the Truth and the Truth will set you free."

Posted By: traveleric
Date Posted: 23 Jan 2022 at 7:31pm

Hi Jato -

It is the dometic digital thermostat.

I thought it might be a furnace issue as I needed to turn off and back on the on/off switch on the side of the furnace but it would seem less of a headache if being just a thermostat issue?

Thoughts on next steps? Swap out the thermostat with another?

Posted By: offgrid
Date Posted: 24 Jan 2022 at 2:50am

To determine whether it is a tstat or a furnace issue you can simply disconnect the tstat wires at the furnace, replace that with a little switch temporarily and cycle it on and off manually.

Google up Suburban 20000 btu dsi furnace manual and you'll find the schematic there with the wire color codes, as well as a troubleshooting guide. Be sure to let the furnace have time to complete a full startup and cool down cycle before trying to restart.

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1994 Chinook Concourse
1995 RV6A Experimental Aircraft
2015 Rpod 179 - sold