Why a Fixed Furnace Still Sounds Broken to You
She called me back four times in one evening, and the system was already working when she made the second call. It was a furnace that wouldn't cycle right. October, the first real cold snap, the kind that comes in overnight and makes everybody remember they have a furnace at all. She lived alone in a brick ranch out past the school, and the unit was throwing a fault every few hours. Heat, then nothing, then heat again. I got there in the afternoon. The blower wheel was packed with dust and a limit switch was nuisance-tripping on the high side. I cleaned the wheel, swapped the switch, watched…
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