A fire symbol on a thermostat is a visual indicator that the temperature in the room has exceeded the thermostat’s set point. This symbol serves as a warning to the user that the temperature is too high and needs to be adjusted. The fire symbol is usually accompanied by a warning sound, such as a beep or a buzz, to further alert the user. The fire symbol is usually located near the temperature display on the thermostat, and it is typically a bright red color to make it easy to spot. It is important to adjust the thermostat setting when the fire symbol appears, as it can indicate that the room is becoming too hot and can cause damage to the thermostat or other equipment in the room. Additionally, it can also be a sign that the thermostat is malfunctioning and needs to be serviced.