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Why does my fan not turn off? I have 2 stage Robert Shaw Thermostat. The outside stage turns off, but the fan keeps running. Both stage 1 and 2 are set at 1degree differential and the upstage setting is at 20 minutes.

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What brand of air conditioner do you have and are you sure it ii two stage?

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From the patent: A two stage cooling system in which the first stage's cooling affect is transferred to the second stage through direct contact with an oil-like material. The oil-like material is cooled by direct contact with water which has been evaporatively cooled. The oil-like material is then utilized to cool the air stream prior to the second stage evaporative cooling. The use of an oil-like material in the first cooling stage of evaporative cooling allows a relatively dry air stream to be produced so as to fully capitalize upon the evaporative cooling affect of the second stage cooler.

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I hope this helps.

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