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12-05-2016, 10:35 PM
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#1
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Junior Member
Join Date: Dec 2016
Location: Molalla
Posts: 4
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Montana furnace or thermostat not working well
Have new Montana 3820fk with Atwood furnace and dometic thermostat. When I turn on furnace, i set fan to auto and then set temp. Blower turns on then furnace. Works great but once it turns off, it won't start again. The blower turns back on and I can hear the furnace trying to fire up but it doesn't. I have to completely turn off, wait a bit, and then turn back on to get working again.
Any ideas? What am I doing wrong?
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12-06-2016, 07:32 PM
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#2
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Junior Member
Join Date: Apr 2016
Location: Lakewood, WA.
Posts: 25
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I noticed a similar thing for Air Conditioning on our 3820FK this last September during 90 plus degree days. I figured it was something to do with the technology. I would turn it off to reset and then turn it back on for AC. The heater worked fine for us, but was only on to warm the trailer up.
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Henry
2016 Montana 3820FK & 2015 Chevy HD
Retired USAF & DHS
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12-12-2016, 09:36 AM
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#3
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Senior Member
Join Date: Aug 2013
Location: Oregon
Posts: 783
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Quote:
Originally Posted by OregonTroy
Have new Montana 3820fk with Atwood furnace and dometic thermostat. When I turn on furnace, i set fan to auto and then set temp. Blower turns on then furnace. Works great but once it turns off, it won't start again. The blower turns back on and I can hear the furnace trying to fire up but it doesn't. I have to completely turn off, wait a bit, and then turn back on to get working again.
Any ideas? What am I doing wrong?
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I was hoping someone would have responded to your question as I am having the same issue! Did you find the "fix?"
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Jeff & Jan - Retired & Full-timing since 2013
2019 Ram Big Horn 3500 Aisin 4x4
2012 Alpine 3450-RL
Double Coin 235/75R-17.5/16 J rated 125lb
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12-12-2016, 11:47 AM
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#4
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Senior Member
Join Date: Jul 2014
Location: Solomons
Posts: 3,874
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Chuckster57, JRTH, do you have advice for these folks?
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Tom
2019 Alpine 3651RL
2016 F350 CC DRW
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12-12-2016, 01:19 PM
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#5
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,351
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Occasionally these kind of threads get discussed between myself and the other tech here. Our thoughts are control board.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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12-12-2016, 02:49 PM
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#6
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,997
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I'm really at a loss as to what it "would be". A couple of guesses on what it "could be": I agree with chuckster, control board is the most likely problem. But, it also "could be" carbon from a bad connection on the ignitor circuit. If it were mine, I'd look first for "soot" on the "sparking end" of the ignitor. If it looks clean, I'd focus on a replacement control board. My recommendation would be "Dinosaur Electronics" not the OEM.
As for the thermostat. It's essentially an "off/on" type device, so if it worked once, it will work the next time. I wouldn't think it would be the problem.
All of this is "best guesses" so it may well be "almost anything".... If the trailer is in warranty, let the dealer "deal with it"... If it's "just out of warranty" remember the appliances have their own warranty, the furnace is, I believe 3 years, so any "authorized service center" for that brand could do the work.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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12-13-2016, 05:12 PM
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#7
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Senior Member
Join Date: Jun 2013
Location: Arizona
Posts: 375
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Had a similar problem last winter. By holding something over the exhaust port on furnace, I could get it to light. After a while tho had to replace the igniter and no more problems.
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01-02-2018, 06:51 AM
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#8
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Junior Member
Join Date: Jan 2018
Location: Bradford
Posts: 2
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Quote:
Originally Posted by JRTJH
I'm really at a loss as to what it "would be". A couple of guesses on what it "could be": I agree with chuckster, control board is the most likely problem. But, it also "could be" carbon from a bad connection on the ignitor circuit. If it were mine, I'd look first for "soot" on the "sparking end" of the ignitor. If it looks clean, I'd focus on a replacement control board. My recommendation would be "Dinosaur Electronics" not the OEM.
As for the thermostat. It's essentially an "off/on" type device, so if it worked once, it will work the next time. I wouldn't think it would be the problem.
All of this is "best guesses" so it may well be "almost anything".... If the trailer is in warranty, let the dealer "deal with it"... If it's "just out of warranty" remember the appliances have their own warranty, the furnace is, I believe 3 years, so any "authorized service center" for that brand could do the work.
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What is and where is the control board on 2009 Mountaineer?
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01-02-2018, 08:53 AM
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#9
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,997
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The control board for the furnace is INSIDE the furnace. Pull out the owner's packet that came with your trailer and inside that packet is the owner's manual for the furnace (you'll find many owner's manuals in the packet). Go to the last few pages in that owner's manual and you'll find an illustrated parts breakdown. It will show you how the furnace is assembled and where each of the components is located on the furnace.
As a note, if you're not a "handman type", and you're asking "Where is the furnace control board located?" and you don't have much experience taking things apart/putting them back together (without ending up with spare parts), then I'd urge you not to start with the furnace as your first project..... While it's not "extremely complicated" it is not as easy as changing a light bulb on your range hood. So, depending on your mechanical interests and capability, you may find that taking it to the dealership or finding a mobile RV technician might be the better option.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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01-02-2018, 09:21 AM
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#10
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Junior Member
Join Date: Jan 2018
Location: Bradford
Posts: 2
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Thank you for the information. I am new to working on trailers. I hope I have no problem.
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