Hey Guys,
My friend has a gas fired forced hot air furnace mounted in her attic (a
cold place). She tends to shut it off during the day while she's at work. A
few days ago, she turned it on and it ran normally for around 30-45 minutes
and then completely shut off. This was over 10 degrees from the stat set
point. She says that left alone, it does not turn back on, however, if she
shuts it off at the stat, then turns it back on, it will fire right back up
and run for another 30 minutes or so. Basically, to keep it running, she has
to cycle power at the stat every time it shuts down. Any ideas as to what
could be causing this? Any advice is appreciated. Thanks Much!

Cape Cod wrote:

Hey Guys,
My friend has a gas fired forced hot air furnace mounted in her attic (a
cold place). She tends to shut it off during the day while she's at work. A
few days ago, she turned it on and it ran normally for around 30-45 minutes
and then completely shut off. This was over 10 degrees from the stat set
point. She says that left alone, it does not turn back on, however, if she
shuts it off at the stat, then turns it back on, it will fire right back up
and run for another 30 minutes or so. Basically, to keep it running, she has
to cycle power at the stat every time it shuts down. Any ideas as to what
could be causing this? Any advice is appreciated. Thanks Much!


Hi,
How about fetching error code first when it shuts down?
Good luck,
Tony

Cape Cod wrote:

Hey Guys,
My friend has a gas fired forced hot air furnace mounted in her attic (a
cold place). She tends to shut it off during the day while she's at work. A
few days ago, she turned it on and it ran normally for around 30-45 minutes
and then completely shut off. This was over 10 degrees from the stat set
point. She says that left alone, it does not turn back on, however, if she
shuts it off at the stat, then turns it back on, it will fire right back up
and run for another 30 minutes or so. Basically, to keep it running, she has
to cycle power at the stat every time it shuts down. Any ideas as to what
could be causing this? Any advice is appreciated. Thanks Much!


Maybe the limit switch is activating due to an overheated furnace and
locking it out? Is the filter clean? Ducts open?

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