Hunter Fan 40120 - Manual (Page 25)

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1. My heating or cooling will not turn on or off.
1 a. Check the HE/HG switch to ensure it is set to the correct
position.
1 b. Check the circuit breakers and switches to ensure there is
enough power to the system.
1 c. replace the batteries with fresh AA alkaline batteries.
1 d. If applicable, make sure the furnace blower door is closed
properly.
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2. My system continues to operate when the
thermostat is in the off position.
2 a. replace unit.