Anticipator or sensitivity issue Honeywell thermostat

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  #1  
Old 11-21-17, 12:07 PM
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Anticipator or sensitivity issue Honeywell thermostat

I have a Honeywell RTH6350 (or RTH6450) programmable thermostat. At times the heat starts short cycling after reaching the desired temperature. It seems as though the thermostat is just getting to the proper temperature and air movement is causing it to fall fractionally, resulting in the need to generate more heat. Once the temperature is solidly at the desired temperature, the issue stops.

It appears to me the thermostat is overly sensitive or has an anticipator in need of adjustment. However, I can find no such adjustment on the thermostat.

Any Thoughts?
 
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Old 11-21-17, 12:38 PM
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Newer technology means things get renamed. Now it is heat cycle rate.

Look at page 17/18 of the instruction manual: https://www.homedepot.com/catalog/pd...4687968a10.pdf - Higher number means more cycling.
 
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Old 11-21-17, 01:48 PM
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Higher number means more cycling.
Excuse my ignorance, but I have to ask a simple question. I went through the advanced settings and the cycle rate correctly shows 5, which is a system with less than 90% efficiency. This strikes me as the correct setting for my unit which is 30 years old - really.

Does this mean my system is operating correctly and I should leave it alone?

What happens if I change it to 4, which may reduce cycles but be an incorrect setting?
 
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Old 11-21-17, 02:25 PM
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It perfectly acceptable to lower the cycle rate to meet your needs.
 
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Old 11-21-17, 02:41 PM
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The number is a best guess average by Honeywell. Trying to minimize overshoot while maximizing efficiency and comfort.
 
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