Furnace Issues

[roopi]

Sorry I forgot to update this. I tried setting the fan to on and the blower would not start. Had a tech out and they advised it was the blower or board and suggested to replace both at the same time. Parts finally arrived this week and they are being replaced right now. Not a cheap fix.

[suntan]

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Seems like a lot of people have Lennox furnaces.
Recently had mine replaced and the plumber went off about them... particularly the 10-15yr old models. Went on about parts being too expensive and wondering why so many people would buy a furnace that was made in the southern US. Think Texas to be exact. He said the really old ones are excellent, but for some reason the newer generation wasnt, and every part I needed was at least a few hundred more then the competitors. Also went on about not using upgraded filters as it just causes the fan and blower to work harder.. cheapest 3 pack or whatever that home depot sells.
We ended up with a Napolean furnace.. apparently made in Canada. Only time will tell if it holds up.

Every furnace seems to suck now, mostly due to the insane efficiency ratings they have to hit.

[dirtsniffer]

Original 1991 furnaces here. Both seem to be short cycling. Firing up for a minute or two before shutting down. Any thoughts?

[bjstare]

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Original 1991 furnaces here. Both seem to be short cycling. Firing up for a minute or two before shutting down. Any thoughts?

When mine did that it was because I hadn’t changed the filter in forever during Reno’s and it was clogged up.

[ExtraSlow]

Thermocouple thingy? No error codes?

[dirtsniffer]

Changed the filters in the summer. Haven't been run much since.

Watched it a couple times. Burners light up fine. Once the bower motor fires up the gas shuts off after 5-10 seconds.

[ThePenIsMightier]

Cut its power, wait 1 min and then turn it back on.

Also check exhaust vent for ice blockage.

[90_Shelby]

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Thermocouple thingy? No error codes?

Flame sensor, take it out, hit it with a scotch brite pad, reinstall.

[killramos]

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Cut its power, wait 1 min and then turn it back on.

Also check exhaust vent for ice blockage.

Considering the blowing snow we had and the relative rapid temp drops. Vent blockage of some kind is also my vote.

[The_Penguin]

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Changed the filters in the summer. Haven't been run much since.

Watched it a couple times. Burners light up fine. Once the bower motor fires up the gas shuts off after 5-10 seconds.

Check the controller lights for codes. Could be flame rollout, or pressure/over temp sensor.

[oster]

check your intake and exhaust vents outside for blockage

[vengie]

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Flame sensor, take it out, hit it with a scotch brite pad, reinstall.

This.

[prae]

I dont think there were HE furnaces in 1991; the comments about vent blockage probably won't apply.

[suntan]

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I dont think there were HE furnaces in 1991; the comments about vent blockage probably won't apply.

Those can still be blocked, depends how the snow drifts. The PiLs have to go out and clean the snow off theirs very occasionally.

[killramos]

Carbon monoxide poisoning didn’t exist in 1991

[suntan]

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Carbon monoxide poisoning didn’t exist in 1991

Carbon wasn't even known in 1991.

[killramos]

Great times