A home furnace thermostat is a device that helps to regulate the temperature of a home by controlling the furnace. It works by sensing the temperature of the air in the home and then sending a signal to the furnace to turn on or off as needed to maintain the desired temperature. The thermostat can be set to a specific temperature and will turn the furnace on or off to maintain that temperature. It can also be programmed to turn the furnace on and off at certain times of the day, such as when you leave for work or come home. This helps to conserve energy and keep your home comfortable. A home furnace thermostat is an essential part of any home heating system and is an important tool for keeping your home comfortable and energy efficient.