Question about Honeywell 5-1-1 Day Programmable Thermostat RTH7400D1008

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Battery I have four wires and all runs well. Does it run without batteries? When I take them out it doesn't run. Yet pkg states battery-free operation (optional)

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  • Ann kim
    Ann kim Apr 29, 2014

    supposedly it does according to the packaging on the thermostat. However it does not have instructions for this option.

  • Vuk B Apr 29, 2014

    I think you need "C" connected and if you dont have it that you need batteries. Good alkaline batteries will last a year. If still not sure best to contact Honeywell directly.

  • Vuk B Apr 29, 2014

    For assistance with your Honeywell product, please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468-1502.

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Battery-free operation (optional) ?

Does your unit have this option?

Posted on Apr 29, 2014

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