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Old 01-05-2016, 03:10 PM   #1
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2015 Flying Cloud furnace won't kick on...

Our furnace will not start. Sounds like it is going to start and then cuts off.
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Old 01-05-2016, 04:01 PM   #2
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Do you have propane? Does the stove light? How about the propane water heater? Start there and report back...
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Old 01-07-2016, 05:13 AM   #3
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Did you check that fancy thermostat? Is it set to allow it?
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Old 01-07-2016, 06:58 AM   #4
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If you have not used it for a while. It may need to cycle a few times to purge any air that may have gotten in the line. Also high altitudes can effect the heater as well.
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Old 01-07-2016, 05:58 PM   #5
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Quote:
Originally Posted by renderit View Post
Did you check that fancy thermostat? Is it set to allow it?
That " fancy" thermostat is a "Republic American Pain in the Butt!"
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Old 01-07-2016, 07:31 PM   #6
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Is the battery voltage up? Low voltage will cause shutdown. Plug the rig into 120 volts and that will give you full 12 volt power via the converter/charger to check that issue.
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Old 01-08-2016, 12:34 PM   #7
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Originally Posted by Corkypoodle View Post
Our furnace will not start. Sounds like it is going to start and then cuts off.
Please give us more details. Are you plugged in to shore power? If you are not plugged in, what is your battery voltage on the monitor? Are the rest of your 12 volt systems working, including the lights, refrigerator, and so forth?

Have you checked the water level in the batteries, and used a hydrometer to assess the condition of the battery water? How long did your trailer sit on the dealer's lot before you bought her?

Are you certain that you have propane, and that the valves are open? Do the burners on your cook top light and continue to work?

Did your furnace work before, and what have you been doing recently (such as camping in cold weather, etc.)?

Please describe the thermostat settings you have used, and your level of familiarity with using the thermostat before.

The more details you can give us, the easier it will be to diagnose your problem.

Thanks,

Peter
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Old 01-17-2016, 02:16 AM   #8
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Quote:
Originally Posted by Corkypoodle View Post
Our furnace will not start. Sounds like it is going to start and then cuts off.
Curious whether you got this handled and what the solution was.

Thanks,

Peter
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Old 01-17-2016, 10:26 AM   #9
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Funny the things we learn accidentally. Took us years to realize we could reset the tripped (non-starting) furnace from inside the trailer. Previously we (read: I) went outside with a flat blade screwdriver, opened the furnace cover, rocked the switch beside the red flashing light.

Two recent learnings:
(1) the red flashing light on our Atwood reveals a code,
1 flash with 3 sec pause = air flow/limit switch
2 flash with 3 sec pause = flame sense fault
3 flash with 3 sec pause = ignition lockout fault

(2) The on-off switch in our furnace's aftermarket digital t-stat (by Hunter) will reset the fault and try to start the furnace again - without going outside at all. OTOH, we would lose the opportunity to view which failure code was indicated.

OTOH, we were hitting the reset button for the first 9 years without realizing we could have read the code. Now I want to see which it is. Maybe I could have a little view window to see the flashy red light, sort of like the flame window on the water heater cover. Probably won't do it though.

All said, our furnace sometimes, not often, requires two restarts. Especially wet weather perhaps sticks the air flow switch a little? We'll need to read the code next time to say.

Good luck to OP. Hope you got it going.
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Old 07-18-2016, 06:06 PM   #10
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I posted this months ago but I have found out to have thermostat fan on lo med or hi and not auto. Thanks all for the suggestions.
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Old 12-19-2016, 06:37 PM   #11
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Plugged to 50 AMP (with adaptor, our rig takes 30 Ams but I thought the more the merrier, mistake?) and furnace worked well till two nights ago when we got 'home' to find a freezing welcome, the furnace was not working. I restarted it a couple of times and kicked in. OK, tonite again, very cold reception by our FC27FB 2016, the fan running but cold air coming out. I tried restarting several times, same result. I changed mode to HP and now it is running, warming up the place. All circuit breakers are up, we have power coming in (obviously, since HP is working) but no idea why furnace won't produce hot air, only cold. Thermostat set at 70, room temperature is 54, outside is 47 and dropping. I understand HP won't work past certain low. Any ideas will be appreciated.
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Old 12-20-2016, 03:58 AM   #12
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Light a stove burner and then cycle the furnace. (Turn it off and then on again)

If the flame on the burner gets suddenly smaller when the furnace tries to lite you have a bad LP regulator. This is the most common problem.

You should hear a faint rapid clicking as it tries to lite, that is the spark igniter. If you don't hear that and never hear a slight roar from the furnace then it is likely a bad circuit board. It is easy to change if you can't get to a service centre easily.

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Old 12-20-2016, 04:35 AM   #13
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Let us know what you find from Andrew's advice, and what you observe as the burner tries to light. Listen carefully (can you see/hear anything better from outside?). Does the burner light at all and produce an inconsistent sputtering flame? If so the flue may have internal obstructions including spider/insect nests in it. Plenty of threads going in that direction.

Does your water heater work on propane?

Good luck!

PS I would also do a hard reboot of your stat per the Dometic manual which came with the AS paperwork, just to eliminate one variable.
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Old 12-20-2016, 04:59 AM   #14
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Even plugged in your batteries need to be up over 12amps as the furnace runs off the batteries.
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