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Old 12-01-2016, 10:33 AM   #1
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2009 22' Interstate
Covington , Louisiana
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Intermittent Gas Furnace Ignition Failure

I have a 2008 Interstate with the Atwood gas furnace model 7916-II. For the past several winters the furnace has failed to ignite about 30% of the time. The blower comes on, the ignitor cycles on 3 times and then it shuts down with the red light on the circuit board flashing 3 times. At that point I have to cut the power to the unit with the rocker switch above the circuit board, and try the ignition cycle again. I can't seem to find any common situation for when the ignitions fails, I just have to try sometimes several cycles of reseting unit to get it to light

The fuel pressure seems adequate, the stove and generator both run fine. I called Atwood and they weren't very helpful but did say to check the fuel pressure...I have no easy way to do that. Does anyone know if there is an adjustment on the propane regulator coming off the propane tank that I should be looking at?

I pulled the ignitor and it looks ok and has great "sparky " sounds when it's trying to light.

I think I've read the other forum threads on furnace problems, but none mentioned an intermittent problem like I have.

Any tips or things to check would be much appreciated. Thanks in advance.

Lew the Solar Guy.
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Old 12-01-2016, 12:14 PM   #2
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Is there anything in the manual about diagnostics that might explain the three LED flashes?
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Old 12-01-2016, 05:35 PM   #3
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2009 22' Interstate
Covington , Louisiana
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The Airstream manual is useless on the furnace and the Atwood manual doesn't have a troubleshooting section. The Atwood tech support lady just said the three red flashes means no combustion but nothing that I can follow up on.

At this point I'm going to try checking and maybe re-crimping all of the electrical connections then if that doesn't work I'll try to get a replacement circuit board or just replace the entire furnace unit or maybe even replace the entire RV....
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Old 12-01-2016, 06:19 PM   #4
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2016 Interstate Grand Tour Ext
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Did some googling and found these: http://www.popupportal.com/index.php?topic=32560.0

http://www.justanswer.com/rv-motorho...ot-ignite.html

And a manual with troubleshooting guide starting on page 28: http://bryantrv.com/docs2/docs/hflameservice.pdf

Good luck.
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Old 12-02-2016, 08:42 AM   #5
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Thank You!!! I will check out those links!!
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