 |
|
12-27-2019, 09:00 AM
|
#1
|
|
Junior Member
Join Date: Dec 2019
Location: Scotts Valley
Posts: 11
|
Furnace, Sail switch
Hello group, I have a new 2020 Montana 3120RL and I believe that Sail switch is out. I am a full timer currently living at a RV park in Scotts Valley CA..and I don't have a two gig yet, so moving it will be expensive. Has anyone replaced the Sail switch on their own. If I do the work myself or call in a model Tech does that void the warranty? Any help would be greatly appropriated, its cold! LOL
Dave And Cindy Wilson
|
|
|
|
12-27-2019, 09:43 AM
|
#2
|
|
Senior Member
Join Date: Feb 2014
Location: radium hot springs bc
Posts: 2,007
|
Quote:
Originally Posted by ddcwilson
Hello group, I have a new 2020 Montana 3120RL and I believe that Sail switch is out. I am a full timer currently living at a RV park in Scotts Valley CA..and I don't have a two gig yet, so moving it will be expensive. Has anyone replaced the Sail switch on their own. If I do the work myself or call in a model Tech does that void the warranty? Any help would be greatly appropriated, its cold! LOL
Dave And Cindy Wilson
|
Call mobile RV Techs in your area. Some of them are authorized Dometic/Atwood repair depots. Had ours go out also.
There is a 2 year warranty on the furnace. Not a big job if you can find a switch locally.
__________________
2018 Ram 3500 6.4 Harvest Edition
2018 Cougar 27RESWE 
|
|
|
|
|
12-27-2019, 09:49 AM
|
#3
|
|
Junior Member
Join Date: Dec 2019
Location: Scotts Valley
Posts: 11
|
Thank you for your input!!
|
|
|
|
|
12-27-2019, 10:19 AM
|
#4
|
|
Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,347
|
How did you determine the sail switch is bad? It isn’t very common for it to fail.
__________________
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.
|
|
|
|
|
12-27-2019, 10:42 AM
|
#5
|
|
Junior Member
Join Date: Dec 2019
Location: Scotts Valley
Posts: 11
|
I am guessing that is what the problem is. From what I have read if the switch is bad the furnace will turn on and turn off within minutes, which is what it is doing, and from the comments I have read in this forum the sail switch is probably the cause of my problem. I also called Keystone and after I informed them of what the furnace was doing, they listed it as a Sail switch problem.
|
|
|
|
|
12-27-2019, 11:19 AM
|
#6
|
|
Senior Member
Join Date: Mar 2014
Location: Mountain Home, Idaho
Posts: 3,013
|
When you say “Turns On” do you mean blower comes on and runs for about 45 seconds and the turns off without getting any heat?
__________________
2007 GMC Classic club cab 4x4 Duramax LBZ
2014 Alpine 3010 RE. 34 foot fifth wheel
|
|
|
|
|
12-27-2019, 11:28 AM
|
#7
|
|
Junior Member
Join Date: Dec 2019
Location: Scotts Valley
Posts: 11
|
When I say comes on .....the blower turns on and then the furnace ignites blows warm air for a minute or so then turns off......then after a few minutes it repeats the possess.
|
|
|
|
|
12-27-2019, 02:03 PM
|
#8
|
|
Senior Member
Join Date: May 2018
Location: Markham, Ontario
Posts: 1,942
|
If it starts to heat, I don't think it's the sail switch. If the sail switch is not working the furnace doesn't heat at all.
__________________
Dan & Serena
2019 GMC SIERRA 2500 HD SLE
2015 Cougar X-Lite 29 RET
|
|
|
|
|
12-27-2019, 03:13 PM
|
#9
|
|
Senior Member
Join Date: Feb 2014
Location: radium hot springs bc
Posts: 2,007
|
Quote:
Originally Posted by Northofu1
If it starts to heat, I don't think it's the sail switch. If the sail switch is not working the furnace doesn't heat at all.
|
^This is true. The sail switch sends a signal current to the gas valve and ignitor.
__________________
2018 Ram 3500 6.4 Harvest Edition
2018 Cougar 27RESWE
|
|
|
|
|
12-27-2019, 03:25 PM
|
#10
|
|
Junior Member
Join Date: Dec 2019
Location: Scotts Valley
Posts: 11
|
I am basing my opinion of what is wrong from forum conversations I've read here and from what the factory told me was probably the problem based on my description of what the furnace was doing......if its not the sail switch so be it. I still need a model tech regardless.
And from what I've read here on this forum replacing the sail switch is a common issue......and it was the first thing the factory rep mentioned. Personally I don't care if it is or it isn't, I just want it fixed..... 
|
|
|
|
|
12-27-2019, 03:27 PM
|
#11
|
|
Junior Member
Join Date: Dec 2019
Location: Scotts Valley
Posts: 11
|
And thank you for your responses! I do appropriate your advice.
|
|
|
|
|
12-27-2019, 04:42 PM
|
#12
|
|
Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,347
|
Based on what I’m reading, if it lights and goes out, my guess would be either the igniter/flame sensor or the the control board.
You do need it fixed, that’s for sure and a mobile tech should be able to diagnose it fairly quickly.
__________________
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.
|
|
|
|
|
12-27-2019, 07:12 PM
|
#13
|
|
Senior Member
Join Date: Mar 2014
Location: Mountain Home, Idaho
Posts: 3,013
|
Since the furnace is firing up then shutting down .. and blows hot air for a minute there is another item in the circuit called the “Hi Limit” switch... it’s normally always CLOSED and designed to open up at a set temp to prevent overheating of the furnace.
It may be out of tolerance. It’s a new unit and all under warranty. A good mobile RV Tech should be able to diagnose the issue and have parts on board to repair your unit.
__________________
2007 GMC Classic club cab 4x4 Duramax LBZ
2014 Alpine 3010 RE. 34 foot fifth wheel
|
|
|
|
|
12-27-2019, 07:50 PM
|
#14
|
|
Site Team
Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,752
|
Along the high limit switch thought. Check the floor registers for any obstructions. An area rug over a register can block enough air flow to trigger the high limit.
__________________
Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
|
|
|
|
|
12-28-2019, 04:48 AM
|
#15
|
|
Senior Member
Join Date: Mar 2010
Posts: 452
|
Bad control board.
Ron W.
__________________
2019 Cougar 25RLS
03 Dodge 2500 Cummins
Disc brakes
700 watts solar
2000 watt inverter
|
|
|
|
|
12-28-2019, 05:02 AM
|
#16
|
|
Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,692
|
It could be the sail switch but the chances are just as good that it's the control board. I've had one fail that did similar things.
__________________
Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
|
|
|
|
|
12-28-2019, 06:02 AM
|
#17
|
|
Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,996
|
The only way the furnace will ignite (produce any heat) is if the sail switch is operational. It must close, to confirm airflow through the furnace before any signal can be sent to the gas control valve to open or to the ignition circuit to produce a spark to ignite the gas at the burner.
So, chances are good that it's not the sail switch, but rather the control board (flame sensor or high limit sensing circuit).
Essentially, if the sail switch "moves to close the contacts" when airflow is detected, as long as that airflow remains constant, the sail switch shouldn't "open against the airflow" so I'd suspect it's working normally and is not the problem.
ADDED: That said, if the battery is low, there may be a condition where when the furnace calls for heat, the battery can provide enough voltage to power up the furnace, then after 30 seconds to a minute, the voltage drops down to a level that won't maintain the furnace motor speed and the sail switch closes, not because it's faulty, but because the battery in the trailer can't provide enough power to maintain the fan motor speed. That's NOT a sail switch problem, rather a trailer power problem.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
|
|
|
|
|
01-02-2020, 08:22 AM
|
#18
|
|
Senior Member
Join Date: Sep 2017
Location: Qualicum Beach
Posts: 555
|
Quote:
Originally Posted by ddcwilson
Hello group, I have a new 2020 Montana 3120RL and I believe that Sail switch is out. I am a full timer currently living at a RV park in Scotts Valley CA..and I don't have a two gig yet, so moving it will be expensive. Has anyone replaced the Sail switch on their own. If I do the work myself or call in a model Tech does that void the warranty? Any help would be greatly appropriated, its cold! LOL
Dave And Cindy Wilson
|
I have taken mine out several times, it's easy on my model of furnace. Post a pic of your furnace with the outside cover off and I will check it.
BTW, how do you know it is bad?
|
|
|
|
|
01-02-2020, 08:26 AM
|
#19
|
|
Senior Member
Join Date: Sep 2017
Location: Qualicum Beach
Posts: 555
|
It's most likely the board, get a replacement on amazon from Dinosaur Electronics. A FAN50PLUS is most likely what you need.
|
|
|
|
|
01-02-2020, 08:42 AM
|
#20
|
|
Senior Member
Join Date: Nov 2019
Location: Portland, OR
Posts: 114
|
the sail switch went out on my 2 month old Outback. fan kicked on and blew cool air but the furnace never ignited. after a few tries the system shut itself down. so doesnt sound like a sail switch from my experience. having said that its cheap and easy to replace if you can access it without disconnecting the wiring and gas line and pulling the whole unit out as was my situation. the last thing i wanted to risk was a leaky gas line so had the dealer do it under warranty
|
|
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Linear Mode
