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Old 12-18-2015, 10:10 AM   #31
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The control board has a fail safe mode where if after several tries, the furnace does not light and stay lit, it will go into safe mode. You need to shut it off ( remove power ) to reset the control board. Some older mechanical thermostats have an off position. The ones with no real off position ( not just no heat demand setting) you can pull fuse or turn off battery disconnect ( if not on shore power) . This resets the board and your good to go. This can happen if you run out of propane and get air in the system It can take several tries to get the furnace to light and stay lit.
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Old 12-18-2015, 10:13 AM   #32
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You are right, my mistake. Was thinking of another thread. It very well could have been a stuck sail switch or not enough air flow across it. Thank you for correcting me!

My manual states to not block any of the registers. If you do you restrict the air across the sail and can cause this problem. I always make sure not to sit anything on them for this reason. I also keep a screen on the outside vents to keep mice from building a nest in the intake. according to the manual it doesn't take much of an air flow restriction.

Jim
No problem Jim,

Just making sure those following along in the thread don't have confusion.
The additional things you mentioned are good things to remember too!
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Old 12-18-2015, 10:30 AM   #33
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The control board has a fail safe mode where if after several tries, the furnace does not light and stay lit, it will go into safe mode. You need to shut it off ( remove power ) to reset the control board. Some older mechanical thermostats have an off position. The ones with no real off position ( not just no heat demand setting) you can pull fuse or turn off battery disconnect ( if not on shore power) . This resets the board and your good to go. This can happen if you run out of propane and get air in the system It can take several tries to get the furnace to light and stay lit.
The older analog thermostats have an on/off switch you can use to reset the furnace. If you run out of propane you may have to run the kitchen stove to get gas flow to the furnace before you can do a reset. This should clear out most of the air. It still may take a few tries, needing a reset, because many furnaces are at the end of the gas line.

Question. When one tank goes empty and the unit switches tanks could a little air get into the line? It wouldn't take a lot of air to interrupt the flame

Jim
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Old 12-18-2015, 06:18 PM   #34
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And how can this happen??

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I bought my Flagstaff 831RLBSS on Nov 4 and pulled it to Gulf State Park 3 days later. Used the furnace all month in Nov off and on occasionally. Used up one bottle of propane and it automatically switched to the other tank. Left trailer for a few days to return to Tn. Came back and when I turned the heat on the blower would come on and run a minute and shut off. I checked the propane tanks and filled the one empty one. Still no heat. Called warranty repair and they gave me 3 RV repair facilities. I called Cherokee RV and the service tech came out and checked the unit. He found that the switch on the furnace was turned off!!!!

So, how is this possible? I did not turn it off. I don't think I can even reach the switch with the init in place. I know I used the heat prior to this.

Strange things!!
Well besides a ghost the only thing I can think of is a "mouse", if you coach is like mine (and yes I have the same similar heater) the heater is in a location that is open to mice, and since they love to find the most out of the way spot they love heaters, and will make a nest in there.
So I would get some traps, and Cab free and see if that helps get the goblins out of your heater?
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Old 12-19-2015, 10:29 AM   #35
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Well besides a ghost the only thing I can think of is a "mouse", if you coach is like mine (and yes I have the same similar heater) the heater is in a location that is open to mice, and since they love to find the most out of the way spot they love heaters, and will make a nest in there.
So I would get some traps, and Cab free and see if that helps get the goblins out of your heater?
And don't forget to put screens on the intake and exhaust outside. The screens are cheap. There have been many reports of mice building nests inside of furnaces. If they restrict air flow or build nests on the blower they can cause all kinds of problems.

Jim
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Old 01-08-2016, 01:42 AM   #36
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+1 for installing a screen. I just chiseled out a Pan-pipe wasp nest out of my heater. I put a screen on so it won't happen again.
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