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Thermostat failing?
Furnace at the house has been working sporadically. Sometimes, it kicks on, the gas flows and lights, but the fan does not kick on and circulate warm air. Sometimes it will work fine. Tried reset button, pulling batteries, setting the desired temp higher and lower to get it to come on, but it only works occasionally. Not a new thermostat, but not old enough that it has a mercury switch in it.
Is there a way to test it? Replacing it is something I think I can handle myself, but don't want to if it is not worthwhile. Is there a switch in the furnace that may have failed?
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