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03-03-2007, 11:38 AM
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#1
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Montana Master
Join Date: Jul 2003
Location: Clearwater
Posts: 10,917
M.O.C. #420
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Furnace problem--PROBLEM SOLVED...
Furnace was operating properly when the campground had a power outage. The outage should not have effected the furnace as it runs on 12V. Now the furnace seems to fire up but the fan doesn't kick on and the furnace shuts down. Fan will run in the Fan only position on the thermostat.
Checked all circuit breakers and fusses. Everything checks OK.
ON EDIT....
FEEL LIKE A REAL DUMMY. This morning I went out to check what I KNOW to be 2 full tanks and found the indicator to be red. That didn't make any sense and when I switched over to the second tank the indicator didn't switch to green. Gotta a BIG feeling I gots a bad regulator. Monday I'll be getting a new reg. Under warranty of course.
Moral of the story, "DON'T TAKE ANYTHING FOR GRANTED"
AND just what is a Sail Switch? Saw sail swich in the owners manual but couldn't figure out what they and JimF were refering to.
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03-03-2007, 11:50 AM
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#2
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Montana Master
Join Date: Sep 2006
Location: anywhere
Posts: 912
M.O.C. #6260
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sounds like a stuck sail switch..
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03-03-2007, 04:25 PM
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#3
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Montana Master
Join Date: Mar 2005
Location: Port Orchard
Posts: 1,153
M.O.C. #3403
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So what's a Sail Switch and where would one find it?
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03-04-2007, 01:59 AM
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#5
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Montana Master
Join Date: Nov 2002
Location: Weatherford
Posts: 1,383
M.O.C. #9
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John - that link's a keeper. Thanks!
Glenn opted to edit his original post, rather than add a new one. Someone smarter than me still needs to explain the sail switch. All I know is there's a switch in the flow system shaped like a sail that turns on/off depending on the airflow across it moving it.
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03-04-2007, 02:07 AM
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#6
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Montana Master
Join Date: Jan 2005
Location: Cooper
Posts: 1,230
M.O.C. #3029
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Glen-
This something you might want to look for. When my rig was brand new and I used the first tank of propane and the regulator that was supposed to switch to the other tank failed because of another reason other than a faulty regulator.
My problem was the cross over pipe from the driver side tank was left with oil inside when the pipe threads were cut. I don't know whose responsibility to clean the inside of the pipe was, the supplier or Keystone at the assembly point. Regardless the oil was there and it caused quite a headache. Even after cleaning the pipe I still do not trust the system to perform as designed and physically switch tanks after the one on the door side in service goes empty. Hope this is not your problem.
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03-04-2007, 02:30 AM
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#7
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Seasoned Camper
Join Date: Sep 2005
Location: burley
Posts: 95
M.O.C. #4606
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when they fill my tanks, the air wasn't purged on of my tanks and my furnace would not run. the fan would come on but no heat. hope this might help
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03-04-2007, 03:08 AM
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#8
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Montana Master
Join Date: Aug 2004
Location: Cedar Rapids
Posts: 4,876
M.O.C. #1944
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A sail switch is a switch inside the furnace that has a blade (or sail) attached to an arm that catches the air created by the running of the fan. This turns the switch on and allows the propane to be sent to the burner. This may not be the manufacturer's description but that's what it is. If the switch is bad (or stuck) it will not allow propane to flow. In our case, a technician told me to rap the side of the furnace with a rubber mallet and most times the switch will work. It did, it still does.
Orv
Orv
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03-05-2007, 09:05 AM
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#9
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Montana Fan
Join Date: Nov 2003
Location: williamsport
Posts: 252
M.O.C. #680
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The sail switch is a safety switch to prove that the combustion power blower is running.This switch must prove before power is sent to the gas valve.On commercial boilers they call it a air proving switch but it does the same thing however works different.The sail switch is probably just a metal tail on a microswitch that is located in the air stream of the combustion air fan.If the fan runs the little tail will catch the air and move,thus closing the contacts on the microswitch.If the switch is defective or the sail part breaks off;or worse muddoppers or wasps build a nest in the airtube the switch will not close and thus no power to the gas valve.If you feel air on the exhaust blower side of the furnace and no heat you probably first would check the airswitch.Hope this helps shed some light on the subject.
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03-05-2007, 09:16 AM
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#10
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Montana Master
Join Date: Nov 2002
Location: Oceanside
Posts: 20,028
M.O.C. #20
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Glenn, you need to go farther south, where you don't need that furnace!!!  (that's a gotcha, in case you didn't notice, Glenn! )
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03-05-2007, 09:26 AM
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#11
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Montana Master
Join Date: Mar 2005
Location: Port Orchard
Posts: 1,153
M.O.C. #3403
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Thanks guys for teaching me yet one more thing! And now I will know what a sail switch is.
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03-05-2007, 10:43 AM
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#12
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Montana Master
Join Date: Sep 2006
Location: Casa Grande
Posts: 5,369
M.O.C. #6333
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Heck, I thought it was a switch that you turn on and go sailing in your Montana. NOT
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