Question about Honeywell Programmable Thermostat Heater

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Honeywell Digital Thermostat won't click on if temp is below 59

If the tempiture is below 58 degrees in the house the Honeywell Digital Thermostat won't click on to send signal to furnice to turn on but the digital screen indicates it's on. I've flipped the breakers and adjust the batteries and manually turn it on and off. Eventually I'll hear the thermastate click and then the heat will start up. It works fine as long as the temp is above 58 in the house, but I would like to lower the temp in the house while I'm gone. Why won't this work below 58 degrees in the house?

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  • neilharbort Dec 29, 2008

    Thanks for the info, I only adjust the temp about 5 degrees, but would lower it to 55 when I'm out of town for a couple days. I'll exchange the thermostat for another one. Thanks for the helpful advice.

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Do you live there? if so here are the rules for setting back temperature: do not lower the temperature more than 8 degrees F from the temperature you want it when your there, setting it back for periods of less than eight hours is also somewhat futile. Due to laws of thermo-dynamics the heat required to recover from more extreme setbacks or shorter periods of time exceeds the savings acquired by taking said action. As to your question directly there are no reasons why your thermostat should not function at any setpoint temperature that it is allowed to set to (45 normally being the lowest) if it does not function below 58 degrees it has a failure and should be replaced before it fails completely. Suggest a Robertshaw or Braeburn brand thermostat, Honeywell quality has slipped over the past decade to unacceptable levels. Unless your considering a Hunter in which case buy another Honeywell.

Posted on Dec 18, 2008

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