Furnace Cycle Run

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Old 11-09-08, 10:56 PM
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Furnace Cycle Run

Hello,

I have a roughly 15 1/2 year old furnace. Bryant 394B Gas furnace. The furnace cycles 5 times an hour. The thermostat is a Honeywell CT87A 4447 and on the packaging it says it calls for heat when the thermostat temp drops below 1 degree of the desired temo setting and shuts off at the desired temp. Anotherwords I have it at 70 and it comes on at 69 and shuts off at 70. However, How can I change the cycle to run about 3 times an hour? I have logged the cycles for a full day and it turns on for 3 and half minutes then off for 10 minutes and etc... I do know some thermostats have the option to set the cycle from 1 to 12 per hr but this one does not have it. I have tried to adjust the anticipator from the reccomended .4 to .5 and then .6. same thing. It did not change the cycle. I did allow the system to adjust to the changed anticipator setting for a full day.

Any help would be fantastic. Thanks!

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Old 11-10-08, 06:41 AM
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Originally Posted by Ellis00 View Post
How can I change the cycle to run about 3 times an hour?
On that older style t-stat, you can't

I have tried to adjust the anticipator from the reccomended .4 to .5 and then .6. same thing.
Slide it up to .8 to .9, that will help cycle it less.. If it keeps on cycling often, then the heat anticpator is worn out.
 
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