short cycling

[Dan]

25+ year old NG Furnace runs 3 mins then off 9 mins to maintain within +/-1F of the setpoint. I am timing it from by the meter start/stop sounds so the fan is on for 4-5 mins of which the 1st 2 produce no real heat. Seems very inefficient to me. Is this called short cycling? Is it possible to reduce the output BTU's so it runs longer?

[Bob_Loblaw]

"Dan" wrote

And???.....sounds to me like it's doing it's job... BTW, it's ready to retire....

[James]

Replace the thermostat.

[Noon-Air]

Its long past its normal design service life.... you need to look at replacing it.

[gofish]

absolutely. you probably lack the tools or knowledge though

I have a solution you can apply immediately, no tools or knowledge needed. open a few windows until the furnace operates at your desired cycling.

[AKS]

Dan I can not gave you solution but is very inefficient ideal is 30% off and 60% on but is only me rambling Dido

[Oscar_Lives]

Where did you get that?

ideal is 100% on.

[Bob_Loblaw]

"AKS" wrote

Comments would be superfluous....

[Tekkie®]

AKS posted for all of us...

Huh?