Attic hot, Attic fan not running


Old 08-30-03, 12:04 PM
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Angry Attic hot, Attic fan not running

We moved into this 2-story colonial house about 4.5 years ago.

Today I went up to the attic, and found the attic fan is was running. Attic is very hot, probably over 90F. The outside temperature is about 70F. I wonder how the attic fan gets turned on to run. And how to check whether the attic fan is bad or not.

Turned on the fan (forced air) down in the basement, the attic fan did not run either.

Could you some help?

Thanks very much.
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Old 08-30-03, 12:06 PM
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Sorry, some typo in the previous message.

The attic fan is NOT running.

Old 08-30-03, 12:45 PM
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A fan to ventilate the attic is normally operated from a thermostatic switch housed in a metal box at the end of the metal cable that runs from the fan to a wood mount near the fan. This cable is usually less than three feet long, so you should not have to look far. The thermotstat usually kicks in at 110 degrees F, but is adjustable.

Hope this helps.
Old 08-30-03, 12:47 PM
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Attic fan

You have to look around up there. Most of the time the fan there turns on from a thermostat there in the attic. It has nothing to do with the furnace or AC blower. Also the motor of the fan in the attic could be burned out and dont work or does it have power to it?. ED
Old 08-30-03, 01:16 PM
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Thank you, Chris and Ed.

While waiting for the responses, I went up to the attic again. This time I climbed higher so I could see the box connected to the attic fan. Actually this time the fan was running.

You are right. The fan is triggered to run by a thermostatic which was set at 90F.

That's wonderful. The fan is good, and I also learned something today.

Thanks again for your responses and knowledge.

Old 08-31-03, 02:47 PM
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if you want to lower the setting to like say 80, by all means, it!

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