Honeywell Thermostat Cycles On and Off Too Often.

Old 11-29-08, 07:04 AM
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Honeywell Thermostat Cycles On and Off Too Often.

If you own a digital Honeywell thermostat and you are seeing that it cycles your heating system on and off too often, chances are it's is set at a higher cycle rates.

You get your install manual, and go to the section that says "Heating Cycle Rates", "Aux Heat Cycle Rates", and/or "Emergency Heat Cycle Rates".

Here is link to Honeywell's page. Click Here for Honeywell page On the lower right of the page, "Literature / Image Search" type in the model # of your thermostat. Then look for install manual.

I suggest to set that to 3. (3 CPH/Cycles per hour)

Even tho the manual may say, "Electric heat, or standard furnace", that settings has no affect of your system.

What does this means or do?

When you change it to a lower number then what it was set before, the heating equipment is going to cycle on and off less in an hour.

So if it was set to 5, it will cycle 5 times an hour/shorter run time. When change it to 3, it will run 3 times an hour/longer run time.

This does not mean your furnace is going to run at a fixed time an hour, this is an avg run time for mild weather, as the weather gets colder, it will run longer, or more steady on the coldest day.

If your system stills cycles on and off often on the coldest day, chances are your system is way oversized, and can try moving the CPH to 2.

Also, if you are having the same issues with cooling, SOME t-stat will alllow you change the CPH on cooling. You can drop it down to 2CPH.

Last edited by Jay11J; 08-16-10 at 08:12 AM. Reason: Added Honeywell Web Page.

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