For the past 2 weeks the furnace will not turn on unless we turn the thermostat all the way up to 90! It will act like it is starting but then turn off. Then when it turns on it will get up to 80 and then turn off and go back down to 68, any clue what's wrong?
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Lit our fireplace for the first time this season last night and the whole living room filled with smoke, alarm went off. Chimney was cleaned last year...
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