Regular maintenance tasks to keep your thermostats running efficiently.
Replace thermostat batteries annually before heating season, even if the low-battery indicator has not appeared. Dead batteries cause the thermostat to lose programming, Wi-Fi connection, and can leave your HVAC system without a control signal. Most thermostats use AA or AAA batteries.
Place a reliable thermometer next to the thermostat for 15 minutes and compare readings. Most thermostats allow a calibration offset in the settings menu. A thermostat that reads 3 or more degrees off wastes energy by running the HVAC system longer or shorter than needed.