Suburban furnace

[CrusadingCorgis2016RST]

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

[cavie]

Originally Posted by CrusadingCorgis2016RST

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.

[CrusadingCorgis2016RST]

Right. Should have said furnace fan never quits. Not fan from AC

[Bama Rambler]

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.

[CrusadingCorgis2016RST]

No about 15' away all vents blowing in the opposite direction

How do I intilaze

[bubbles]

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.

[CrusadingCorgis2016RST]

I would agree or a limit switch. Might be over heating Might see if there are bugs in the exhaust

[Mr. Dan]

Originally Posted by cavie

Check your thermostat. Put fan in auto.

Cavie, this is a different issue.

[Bama Rambler]

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.