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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. Wait. There may be as much as a 4-minute delay before
the system turns on or off to protect the compressor.
1 c. Check the circuit breakers and switches to ensure there is
enough power to the system.
1 d. replace the batteries with fresh AA alkaline batteries.
1 e. If applicable, make sure the furnace blower door is closed
properly.
1 f. If your system has 4 wires, ensure the jumper wire is
installed between the rC and rH terminals.
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2. My system continues to operate when the thermostat is in the off position.2 a. replace unit.