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Old 06-12-2015, 12:36 PM   #15
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2016 26' Flying Cloud
2016 25' Flying Cloud
1997 21' Excella
Watervliet , Michigan
Join Date: Apr 2015
Posts: 242
My 1997 Excella never had an issue running the furnace above 6,000 feet and up to 8,000 (never ran it higher than this). But I did find an interesting quirk with starting that drove me nuts till I realized why sometimes it wouldn't fully start (similar to your symptoms). Disclaimer, I really don't know if this is a design built in or just a fluke of my 97 Excella, and it did this every year for 16 years). When testing heater out before taking trips, if my inside AS temperature was pretty warm the heater would go through its staring fits and never stay lit. If I waited till the evening, thus cool outside and inside, it would fire up and stay lit. I don't know, but I am not making this one up. I take delivery next week of my 2016 25 FC, I hope it works above 6,000 feet because in two weeks that will be my lowest altitude for 4 weeks. Good luck!


2016 RAM 2500 6.7L Cummins, 4WD, Crew, Rear Air
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Old 06-13-2015, 06:12 AM   #16
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2005 25' Classic
Drummond , Wisconsin
Join Date: Jan 2015
Posts: 7
So glad to see this post. We had the same problem while camping in the Big Horns this May. The furnace worked fine when we got back to lower elevations.
Thanks, Reg

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Old 06-13-2015, 10:05 PM   #17
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2016 30' Classic
Erie , Colorado
Join Date: Oct 2013
Posts: 1,202
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Rich it was 3 inches to high with the appliances running.

Got the new electrode from Atwood and will install in the next day or so.

Can anyone recommend a good not overly expensive manometer so that I can more testing? Tech did the the original testing and probably wouldn't be a bad piece of gear to have.
2015 Classic
2015 GMC Sierra 2500HD Duramax
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Old 06-14-2015, 08:16 AM   #18
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2008 22' Safari
Oracle , Arizona
Join Date: Oct 2007
Posts: 1,174
????? Ours works fine at 10,000'.
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Old 07-26-2015, 03:20 PM   #19
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2015 30' Classic
Cave Creek , Arizona
Join Date: Mar 2015
Posts: 11
Update - Furnace Operation at 7000' on 2015 Classic

I wanted to provide a quick update on my original problem of the furnace not operating above 7000 feet elevation. I was advised by several people (both on the forum and at multiple dealer service departments) that I would need to make an adjustment to the set screw on the trailer regulator to lean out the propane for high elevations. Prior to trying this, the Service Department calibrated the setting (measured and adjusted for the appropriate pressure) at the current location (1000' elevation). On our second trip in the new trailer, we tried making adjustments with no success. The furnace continued to ignite for a couple of seconds and then go out. The regulator adjustment had no effect at small incremental changes throughout the full range of the adjustment (both fully leaned out as well as fully "richened" out. In fact there was no perceptible change in stove flames when making these adjustments as well (or in operation of a generator connected to the external LP connection).

We then returned the trailer to the service department after the second trip. They examined the LP Lines and the furnace itself and found some foreign debris in the lines and in the furnace. In addition, they replaced the regulator and calibrated it again.

On our 3rd trip up to 7500' elevation (just completed today) the furnace worked great with no further adjustments needed - SUCCESS!

Unfortunately by making both changes we cannot specifically point to which item (or if it was the combination of the two) which corrected the problem.

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