Question about Heating & Cooling
How to remove battery from the honeywell T8400C?
Posted by Anonymous on
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Posted on Jan 02, 2017
I would check the batteries in the thermostat. If the batteries are okay then you might have a blown fuse in the furnace or the furnace lost power check the breaker.
Posted on Jan 21, 2010
it should take a battery and it has wires coming from the unit for power as well the stat splits open from the wall leaving some of it mounted on the wall the batteries are in the part that pulls off the wall and the wires are on the part that stays on the wall the power wire is red on r terminal
Posted on Sep 23, 2010
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