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Old 10-24-2021, 06:47 AM   #1
Derekraptor
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Join Date: Jun 2021
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Funace not staying lit

I have a suburban model furnace that will not stay lit what are you guys think flame sensor or a motherboard
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Old 10-24-2021, 07:37 AM   #2
ASCTLC
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Not just flame sensor or motherboard but do a search for "sail switch" too. At least that's the easier of the 3 to check.

Andy
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Old 10-24-2021, 08:06 AM   #3
JRTJH
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don't forget to check the battery charge level, a low battery won't provide enough power to turn the fan fast enough to open the sail switch. Or it could be construction debris/lint/dog hair caught in the fan. Then there's the propane regulator as well as the ducting being clogged and a long list of other possibilities...

Don't start buying $100 parts to throw at it, hoping the first one or two might fix it.... Download the troubleshooting guide and follow through with the "logic tree troubleshooting guide".... https://manuals.heartlandowners.org/...11-05-2015.pdf
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