The MCC Electronic De-icing Thermostat (EDT) is a microcontroller based module that measures evaporator coil temperature and cycles the compressor clutch to maintain a constant evaporator coil temperature. Onboard temperature sensor diagnostics are also built into the module. The EDT is very compact and with the same foot print as the older mechanically operated thermostats.
If the EDT does not detect any temperature sensor failure, it will turn the compressor clutch and status light on when the evaporator coil temperature is above +2°C. When the evaporator coil temperature is below -2°C, the EDT will turn off the compressor clutch output and status light
The EDT has built-in algorithm to protect the A/C system in case of temperature sensor failure.