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12-01-2011, 09:38 AM
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#1
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Montana Master
Join Date: Sep 2004
Location: Leona
Posts: 6,382
M.O.C. #2059
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Atwood Heater
While I was finishing washing my truck, the lady next door asked if I knew anything about RV furnaces. Her's had stopped igniting. She has a 2006 Hurricane motor home made by Thor. My Big Sky has an Atwood albeit an newer model mounted differently. However, there was enough similarity for me to recognize the works. Atwoods have a diagnostic LED on the control circuit board and the meaning is written on the blower housing. We looked at the diagnosis, but I did not understand what it meant.
After calling Atwood Tech Dept., I did some multimeter testing. I did not get the required 12 volt reading. Further instructions led me to remove the blower housing. On the back side of the housing there is a sail switch. So after I got it off we also needed to tested the two terminals on the switch for 12 volts. Bingo! I got twelve volts. Tech told me to put it back together and test the white wire at the circuit board again.
After some issues with small screws in remote, dark places, we finally got it back together after two tries. We turned the unit back on to determine if the blower and housing were in properly. Before I could test the white wire, the furnace ignited.
I really don't know what I did. Perhaps there was a loose connection, or the sail switch was stuck or corroded, or another contact was not making a solid connection. Whatever was the problem, it has been running since. The lady, a single traveling nurse, is exceedingly happy because it got to 32 degrees here last night.
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12-01-2011, 10:11 AM
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#2
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Montana Master
Join Date: Dec 2006
Location: corning
Posts: 694
M.O.C. #6635
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I had a similar thing happen with mine two years ago. I pulled it apart and disconnected all,wires and plugs. Re assembled and it has run fine since.
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12-01-2011, 10:24 AM
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#3
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Montana Fan
Join Date: Aug 2010
Location: Dundas
Posts: 406
M.O.C. #10690
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Good work Stiles. I hope the lady next door knows how to bake a pie
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12-04-2011, 01:13 PM
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#4
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Montana Master
Join Date: Nov 2004
Location: Oak Harbor
Posts: 1,529
M.O.C. #2471
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What a great guy you are Stiles. Did she at least make some cookies for you? Montana owner's are the best, kindest and most willing to help.
Jack
__________________
Previous:2004 Mountaineer 325FKBS,2010 Montana 3455SA Now:2018 Bighorn 3575EL (SOB's ) Res. Fridge,W/D,Disc Brakes,Water Softener,Dish Tailgater PRO,LioN Batts, several mods.
2021 RAM 3500 Laramie.... "LOADED", 4x4, SB H.O. 6.7L, Aisin Trans, PullRite Super Glide Hitch, 52 Gallon Titan Fuel Tank.
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12-05-2011, 02:06 AM
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#5
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Montana Master
Join Date: Jul 2006
Location: K.C.
Posts: 11,731
M.O.C. #5980
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Thanks for helping the lady out, you are a good neighbor, and a good man.
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12-05-2011, 03:32 AM
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#6
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Montana Master
Join Date: Sep 2004
Location: sioux falls
Posts: 1,835
M.O.C. #2121
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Good job, Stiles!
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12-05-2011, 05:52 AM
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#7
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Montana Master
Join Date: Sep 2004
Location: Leona
Posts: 6,382
M.O.C. #2059
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Thanks for the kudos. My real purpose in posting was to disseminate some useful info about the Atwood furnace. The rest was just my tale to wrap the important info. Pertinent info includes: - Diagnostic LED indicator on the circuit board
- Diagnostic interpretation printed on the blower cover
- Where to check for 12 volt current
- Where to find the sail switch on the unit
- And above all, that Atwood Tech Dept was very forthcoming in helping.
I did not mention that when you test the white and blue wires, the blower needs to be in the "on" position. We also vacuumed five years worth of lint accumulation out of the compartment.
Hope you never need this info.
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