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09-06-2018, 11:13 AM
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#1
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New Member
Join Date: Aug 2018
Location: Red Deer County
Posts: 5
M.O.C. #22452
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Furnace problem
We have bought a 2015 Keystone Montana 3611 RL and still trying to solve a few problems. We just can't get the furnace to run, it always tries for a few seconds and then it stops. we found the flashing light and it says air flow problem. Does anybody know how and where to fix this. Thanks
Maggie & Roland
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09-06-2018, 11:17 AM
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#2
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Montana Master
Join Date: Sep 2014
Location: Full Timer In Naples, Florida
Posts: 1,049
M.O.C. #15731
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Remove the outside cover and clean you probably have a mud dauber nest in the air intake. And then install bug screens.
__________________
2017, 3500 Ram Big Horn, 4x4, Crew Cab, DRW, Aisin Transmission, 4:10. Curt Q20, 2014 Mountaineer 331 RLT, Sailun's on the rv and truck.
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09-06-2018, 11:21 AM
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#3
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New Member
Join Date: Aug 2018
Location: Red Deer County
Posts: 5
M.O.C. #22452
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Thanks for your reply but we already did that, it's still not working.
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09-06-2018, 12:01 PM
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#4
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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Have you tried to shut off the tanks, bleed off the pressure, then open the tank valve SLOWLY on the tank the main regulator is pointed at? Then try the furnace?
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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09-06-2018, 12:04 PM
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#5
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,925
M.O.C. #5651
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Also, check if the stove works. IF so, it isn't a problem with the tanks, etc but strictly the furnace.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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09-06-2018, 12:52 PM
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#6
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,676
M.O.C. #12947
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Prior to the furnace lighting, the fan is supposed to run for a bit, then the igniter lights the flame. Does the fan run during the ignition process? If it doesn't, the fan motor may be bad.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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09-06-2018, 01:20 PM
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#7
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,323
M.O.C. #4831
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The problem is most likely a Sail Switch failure. But to be sure, follow the diagnostic procedures spelt out in the following link:
http://www.montanaowners.com/forums/...?do=file&id=11
The Files section of the forum has a number of handy manual, tips and references for many of the common problems.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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09-06-2018, 02:48 PM
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#8
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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You might also check to see if the vents are open. If the previous owner, like we have, installed vents that you can close in the summer you probably won't get enough air flow until they are opened. We have two sets. The open ones that came with the rig and ones that are screwed closed to keep cat hair etc out during the summer. It just occured to me that we traded our old rig with the summer screwed shut vents installed.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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09-06-2018, 09:14 PM
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#9
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Montana Fan
Join Date: Oct 2015
Location: Round Rock
Posts: 475
M.O.C. #17905
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Did you find the problem with furnace ? I have the same unit as you have and I had the exact same problem as you have. Called mobile tech, he checked furnace outside, wires in electrical box.....all good, thought about it for a minute and then removed a/c filter panel in the living room.....yep, just a loose wiring connection. Saw this post earlier but didn't ring a bell for me till just now, sorry. Mine happened 2 years ago. Hope it works if you haven't already fixed it.
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09-09-2018, 02:51 PM
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#10
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Montana Fan
Join Date: Mar 2017
Location: Spokane Valley
Posts: 119
M.O.C. #19510
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a/c Furnace Filter?
Your reply started having me wonder where this might be located. We've had ours since March and I haven't come across a filter or filter housing.
__________________
2018 Montana 3810MS
2015 Chevy 3500HD
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09-09-2018, 02:58 PM
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#11
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Quote:
Originally Posted by Mike3387
Your reply started having me wonder where this might be located. We've had ours since March and I haven't come across a filter or filter housing.
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Maybe he is speaking of the heat pump? There is no factory installed filter on the furnace. We are on our 3rd Montana and none have had one.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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09-09-2018, 06:38 PM
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#12
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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We had our AC's serviced and then it turned cold and the furnace wouldn't work, but it wouldn't work at all. They had knocked the communication cable out of the AC unit and so then the thermostat couldn't communicat thru the AC to the furnace. But if the furnace runs at all and then shuts down, that's not it. It's most likely a bad sail switch and if the switch is good there is an obstruction in the ducts.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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09-09-2018, 07:28 PM
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#13
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Montana Fan
Join Date: Oct 2015
Location: Round Rock
Posts: 475
M.O.C. #17905
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Quote:
Originally Posted by Mike3387
Your reply started having me wonder where this might be located. We've had ours since March and I haven't come across a filter or filter housing.
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See # 12 below. Exactly like that. bad wiring connection in air conditioning unit in living area. Sorry for not being a little more clear about it.
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09-16-2018, 04:04 PM
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#14
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Montana Fan
Join Date: Dec 2017
Location: Holts Summit
Posts: 122
M.O.C. #20913
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To clarify: there is a box in the AC unit that communicates with both the furnace and the AC unit for control. If the furnace tries to light/does light/goes out, it could likely be a bad ignitor. this functions both the keep the gas turned on if the flame is lit and off if it doesn't light (like a thermocouple), as well as forming the spark to light the propane stream. If you don't know what you are doing, take it to a tech.
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09-16-2018, 04:41 PM
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#15
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Montana Fan
Join Date: Sep 2018
Location: Reno
Posts: 291
M.O.C. #22620
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Got the same problem in my 2018 unit. Dealer will fix next week - warrenty issue and I have a great dealer (Sierra RV, Reno). I'll update when I find out what the problem is.
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09-17-2018, 06:37 AM
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#16
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Montana Fan
Join Date: Aug 2018
Location: elmvale
Posts: 105
M.O.C. #22355
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air flow switch ,ducts have collapsed or blocked. Had the same issue on my last unit
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09-21-2018, 11:09 AM
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#17
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New Member
Join Date: May 2015
Location: AVA
Posts: 1
M.O.C. #17401
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Had the same with our Hickory. Replaced the sail switch and all is good!
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10-08-2018, 02:39 PM
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#18
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New Member
Join Date: Aug 2018
Location: Red Deer County
Posts: 5
M.O.C. #22452
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Finally the furnace is fixed. It was at the dealership,there was a "limit switch/air flow issue, they had to replace the "limit switch". At least it works now!
Thanks again for your help!!
Maggie and Roland
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