Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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High Electrical bill - Appears to be heatpump problem.

Tenant complains that electrical bill jumped 3 times as much as month before, even thou noone was . 2 level Townhouse - All Electric property- Central Heat and Air system. Has heatpump with zoned programmable thermostats (2 thermos, 1 up, 1 down). The tenant state they turned the upstairs thermostat off, and had the lower floor thermostat to 71 degrees. They say that the outside unit runs constantly, the only way to get it to stop is to turn off the downstairs thermostat. The townhouse was built in 2003, but the outside unit was replaced in 2008.

Could this be because they turned off the upstairs thermostat? Should I try to replace the downstairs thermostat?

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  • ballardr Jan 14, 2009

    I will be visiting the property tomorrow evening. Will check. Thanks for the suggestion.

  • ballardr Jan 28, 2009

    Thanks for your replies.

    I checked out the system myself. It had been serviced last year.

    They system appears to be working ok.

    But: The heating unit in the attic had some duct work where the tape was not sealed properly. A lot of heated air was escaping into the attic. I sealed with aluminum duct tape.

    Also a few of the windows needed weather stipping (and a few were not locked so the cold air was getting in.

    I think the main problem is that the tenant had the upstairs thermostat off, with the downstairs on.

    And Georgia Power went way up on rates!

  • dwkcool May 11, 2010

    first see if the unit is blowing air up stairs with the upstairs t-stat off if so turn it back on and turn down as low as you can get it , some zone systems require the stats stay on for it to operate correctly


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Sound like there are running on emergency heat which is elrctric.Have the system checked out buy a local heating and cooling company. Have they checked the filter and changed them.

Posted on Jan 20, 2009

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