attic fan auto on the blink

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Old 05-17-07, 07:17 AM
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attic fan auto on the blink

Not sure if this is right forum, but our attic fan's thermostat doesn't seem to be functioning properly-it is secured next to the opening in the ceiling where the fan sits and I think the cover I made (2" thick hard foam insulation) to block the cold air from coming in during the winter might have damaged/loosened the thermostat box. At first try yesterday, the unit wouldn't respond until I gave the box a gentle shove with a wooden shim. I was adjusting the setting w/shim and noticed the setting dial not aligned with opening in unit/box. If I move the box to create more space around the opening, will it effect the thermo cell unit which is in a seperate box from the thermostat unit? I would just add a longer wire connection between the two units-right now they are about 10-12" apart. Thanks for advice-
 
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Old 05-18-07, 03:58 AM
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I am not a big "fan" of the thermostatically controlled exhaust fans. After a few years, the fan motor will lock up due to constant moisture during the winter, and the thermostat is a PITA to keep calibrated. You can't cover the thermostat box, as it will prevent ambient temperature changes from affecting the thermostat coils. The fan adjustment pin should stick through the hole in the cover plate. Changing that adjustment will change the kick-in temperature. Maybe no help at all, but if more info is needed, let us know.
 
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