The thermostat batteries seem to run down too soon, and then the furnace doesn't work at all, usually when I am away from home for extended perios. Are the batteries just a backup in case of power failure, or are they always necessary just to make the thermostat function? Shouldn't they last at least a year?

Asked by Neil on 11/06/2014 1  Answer

ManualsOnline posted an answer 9 years, 6 months ago

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