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solved attic fan problem
"z" wrote in message ... this had been bugging me for a while. roof-mushroom style attic fan with junction-box style adjustable thermostat, looks pretty old and like it had been maintained periodically by drunken chimps, wrong sized sheet metal screws sticking out, etc; making me suspicious. attic seemed overly warm on summer days. usual 1950s attic insulation, i.e. less than currently recommended, meaning hot attic generating hot house. so, stuck a remote reading outdoor thermometer up there. gets up to 120+. seemed too high. took second look at fan setup. despite physical appearance, seemed to be working OK every time I check on it. fan capacity OK. twiddled around with thermostat settings, figured maybe somebody had screwed up the calibration. remote thermometer still showing 120+ up there on hot day. look at fan some more, it's running OK every time I check. maybe thermostat is intermittent? finally wire up boom box to thermostat and turn it up loud so i can tell from downstairs when thermostat is opening and closing, with remote thermometer to indicate temperature answer comes very quickly when i come down from attic. turns out fan is wired to attic light switch in hallway near attic hatch/ladder. soon as i get down and turn the attic light off, music stops. turn light on, music starts again. this, despite big clearly labeled (and working) fan shutoff switch in attic. haha. Clark W. Griswald did the wiring eh? |
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