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D&K Davis View Drop Down
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Joined: 16 Oct 2016
Location: Indiana
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Posts: 21 		Direct Link To This Post Topic: Furnace
    Posted: 14 Oct 2018 at 9:01am
My wife and I are camping on this cool Indiana weekend. Last night we turned our furnace on for th first time since we owned our 179 R-Pod. Nothing happened, no blower no nothing. We checked the gas by lighting the cook stove it was fine. 12 volt battery is charged and we are plugged in. I happened to have a volt meter and found that one of the two thermostat wires that attach to the blue wires on the furnace does not have 12 v coming to it. I believe these two wires go from the thermostat to the AC and from the AC down to the furnace? Does anyone know how to troubleshoot the three button single zone Dometic thermostat? Has anyone out there in the R-pod world had this problem?
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GlueGuy View Drop Down
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Posts: 2627 		Direct Link To This Post Posted: 14 Oct 2018 at 9:29am
What is the setting on the thermostat? I think you want it set to "Auto" to get the furnace to work.
bp
2017 R-Pod 179 Hood River
2015 Ford F150 SuperCrew 4WD 3.5L Ecoboost
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D&K Davis View Drop Down
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Posts: 21 		Direct Link To This Post Posted: 14 Oct 2018 at 10:05am
Yes it is set on auto and heat. We have tried turning the thermostat up to 85 def and it still doesn’t work.
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offgrid View Drop Down
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Posts: 5290 		Direct Link To This Post Posted: 14 Oct 2018 at 12:23pm
My 179 doesn’t have the air con connection to the heater but I think the heater itself is probably the same.

If so, this document might be helpful.

http://docs.renegaderv.com/Suburban/Furnaces/FURNACE_Service%20and%20Training%20Manual%2011-05-2015.pdf
1994 Chinook Concourse
1995 RV6A Experimental Aircraft
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offgrid View Drop Down
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Posts: 5290 		Direct Link To This Post Posted: 14 Oct 2018 at 12:29pm
Oh and perhaps this is a dumb question but did you check the furnace fuse?
1994 Chinook Concourse
1995 RV6A Experimental Aircraft
2015 Rpod 179 - sold
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Iceworm View Drop Down
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Posts: 7 		Direct Link To This Post Posted: 14 Oct 2018 at 1:18pm
Try turning the thermostat all the way to the left till it clicks off, then back to the right to set point.
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Iceworm View Drop Down
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Posts: 7 		Direct Link To This Post Posted: 14 Oct 2018 at 1:20pm
.
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Tars Tarkas View Drop Down
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Posts: 1446 		Direct Link To This Post Posted: 14 Oct 2018 at 1:21pm
There are a lot of possibilities.  Start with the simple things first, which you've mostly done. If the fuse is okay, do you hear it trying to start?  The igniter will fire repeatedly for a few second, if the furnace doesn't light, it will try again in a minute or so.  I think it does that three times.  You can hear it clicking.  If it doesn't start, turn the furnace off for 10 minutes and try again.  You could have something like a vapor lock that is preventing propane from getting to the furnace.  (Trying the stove was a good move.)  If it still won't start I'd say there is some kind of electrical problem, either in the furnace, the thermostat, the wires between the thermostat and the furnace, or elsewhere in the Pod.

I had a similar problem a few years ago.  Turned out to be a broken wire between the thermostat and the furnace.  The break, for some reason, was under the floor.  Worst case scenario.  I reported it here.  You can try searching the archives.  But my problem was a zebra.  You should eliminate all the horses first.

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CharlieM View Drop Down
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Posts: 1797 		Direct Link To This Post Posted: 14 Oct 2018 at 3:18pm
When the thermostat calls for heat the blower should start immediately. That clears fumes/gas from the heater before it even tries to ignite. If you don't hear the blower something in the 12V system is amiss. Check the fuse. Only one of the wires to the thermostat will have 12V; the other will be ground, maybe through the blower motor. 
Charlie
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D&K Davis View Drop Down
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Posts: 21 		Direct Link To This Post Posted: 14 Oct 2018 at 4:13pm
Fuse in the breaker box is good
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