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Old 02-20-2018, 05:46 AM   #1
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Suburban furnace

Ok here is the situation. Furnace comes on , heats up. Then cools down. Doesn't get completely cold. Then fires back up. Repeated all night. Fan never turns off. I can hear the gas shut down then reignite. Suggestion? Georgetown 377xl 2017 forward furnace
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Old 02-20-2018, 06:28 AM   #2
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Originally Posted by CrusadingCorgis2016RST View Post
Ok here is the situation. Furnace comes on , heats up. Then cools down. Doesn't get completely cold. Then fires back up. Repeated all night. Fan never turns off. I can hear the gas shut down then reignite. Suggestion? Georgetown 377xl 2017 forward furnace
Check your thermostat. Put fan in auto.
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Old 02-20-2018, 06:49 AM   #3
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Right. Should have said furnace fan never quits. Not fan from AC
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Old 02-20-2018, 07:48 AM   #4
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Is a heat register blowing right on the thermostat?
Which brand/model thermostat controls the furnace?

If it's a Dometic LCD thermostat then you might try initializing it and see if that helps.
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Old 02-20-2018, 08:30 AM   #5
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No about 15' away all vents blowing in the opposite direction

How do I intilaze
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Old 02-20-2018, 08:52 AM   #6
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Sounds like the fan is operating normally. It will come on first and then continue to run for awhile after burner is shut off. Sounds as though the interval after burner shut down is not long enough for the fan to complete its cycle. Does sound like either a thermostat or control board issue.
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Old 02-20-2018, 08:56 AM   #7
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I would agree or a limit switch. Might be over heating Might see if there are bugs in the exhaust
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Old 02-20-2018, 09:00 AM   #8
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Quote:
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Check your thermostat. Put fan in auto.
Cavie, this is a different issue.
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Old 02-20-2018, 11:19 AM   #9
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There's a paragraph in the manual (such as it is) that instructs you on how to initialize it.

If the initialization doesn't work, it may be heating up and tripping a hi-temp cutout.
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