Carrier Weathermaker 8000 AC runs continuously

Hello, I have a: Carrier Weathermaker 8000 model 58WAV070-12 s/n 4999A11255 Carrier Tech 2000 compressor. For the past two days I've had these intermittent problems: The AC fan and compressor run continuously cooling the house down to 69 degrees. The thermostat makes the appropriate noise as the temperature passes the set temperature but the AC fan and compressor continue to run. The fan switch isset on auto. Voltages at the thermostat and the board are Red>>Yellow 0V.Red>>Green 0V. Red>>White 24V. If I trip the circuit breaker to the compressor, it turns off, but the furnace fan continues to run. Voltages at the thermostat and the board are Red>>Yellow0V. Red>>Green 24V. Red>>White 24V.