Rheem-Ruud 45-42374-83 Flame Sensor

The Rheem-Ruud 45-42374-83 Flame Sensor is a crucial safety component found in Rheem-Ruud gas-fired furnaces and boilers, as well as potentially compatible brands. It is critical to ensuring that your heating system runs safely and consistently. Here is how it works: When your furnace ignites, the flame sensor kicks in. It is situated near the burner assembly and continuously detects the existence of a flame with a photoconductive cell or thermocouple. These components detect the hot and light signatures of the burning gas. The flame sensor continuously sends this data to the furnace control board. The furnace functions properly as long as it senses a consistent flame. However, if the flame sensor loses the flame signal for some reason, it sends a safety message to the control board.