Upon arrival, thermostat is showing no communication to wireless module. Inspection of furnace shows that there is no high voltage to system. On wall inside of furnace closet, there is a switch labeled "furnace disconnect" that was flipped off. Flipped switch on and system cam on as it should. Connected thermostat to module and test ran in geothermal heating stage 2. Filter is clean and system is operating properly. Recommended light switch covers to prevent same issue in the future.