Question about gas furnace

short cycling and

heat anticipator setting

John Maurice; South Paris, Maine wrote:
on Thursday, January 4, 2001 at 09:20:50
> Brand: Miller
> type: hot air furnace
> fuel: kerosene
> location: living quarters
> Problem: temperature
Hi:
> My furnace is running through it's cycle and heating the house as it should, however, the burner turns off and on about 3 times during it's normal cycle. We had the furnace checked recently, and I think the serviceman may have accidentally bumped the temp controls. We can't pay to have him come out here again. I see three controls labeled off-on-off, with
(I assume) a temperature setting label. The first off is set to 100, the on is set to 160, and the off is set to 200. How should I change these to make the burner run once during the cycle? Thank you very much for your time and this service!
>
> -John

Date: Thus, 04 Jan 2001 17:38:38 -0500

I am not sure why it would go off on high limit unless you have a clogged filter. 200 degrees is plenty high for the high limit. If it does cycle on high limit it should be no cause for concern.
Sometimes the gas companies change the btu content of the gas too. Check your thermostat under the cover is a little electric heater called the anticipator. its job is to cause the thermostat to turn off the burner before the house gets too hot. Usually it is set to the current draw on the gas valve. If it has been moved to a lower number that would cause the burner to short cycle. The way to know is to remove the cover on the thermostat and watch the mercury bulb to see if it is falling to the off position. If it is not check to see if the limit is opening.
Scott 240-460-3820

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