The replacement is quite simple and straightforward.
Attic fan thermostat o off switch.
The thermal switch will turn off the motor when the temperature in the attic reaches 70 f.
An attic fan thermostat is an automatic monitoring mechanism that switches the attic fan on and off according to the changing temperature in the attic.
Sometimes it works out more economical to replace the attic fan thermostat instead of repairing it.
Make one of your wires from the 12 2 either red or black a direct power to your thermostat.
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If the fan comes on you know that the problem lies with the fan thermostat.
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The thermal snap switch is a small device which attaches to the attic fan motor designed to turn on the natural light solar attic fan when the temperature in the attic reaches approximately 80 f.
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If your fan has a thermostat turn the fan on and off bypassing the thermostat.
Most either come with a programmable thermostat or can be wired to one which will turn the fan on when the attic reaches a set temperature no need for flipping a switch or monitoring the attic.
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Place it so it s facing in the direction of the air that s being drawn out of the attic by the fan.
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In other words that switch will go straight to the fan motor.
Start by screwing the thermostat switch to the plywood frame that houses the fan.
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Switch off the power of the attic fan and remove the power cord.
Remove the cover of the thermostat to expose the black and white wires as well as the green ground screw.
The cost of repairing the thermostat depends on the cause of the attic exhaust fan problem.
Locate the thermostat casing and open it using a screwdriver.
It is easily installed on the wires under the fan.
Make the other wire from your 12 2 run off your switch to your fan and splice it in with the wire going from the thermostat to the fan motor.
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