Thermostat Says No Power - Is the display dark or blank? Your thermostat is connected to a system. Web a “no power” alert can be caused by the following: The battery needs to be replaced. The thermostat wiring is incorrect.
Your thermostat is connected to a system. Is the display dark or blank? Web a “no power” alert can be caused by the following: The thermostat wiring is incorrect. The battery needs to be replaced.