Lochinvar & A.O. Smith 100108267 24" Thermocouple

The Lochinvar & A.O. Smith 100108267 24" Thermocouple is a temperature-sensing component that is used in gas-fired water heaters and boilers within the HVAC systems. It is composed of a metal probe that creates a millivolt signal that is proportional to the heat produced by the pilot flame, which enables the gas valve to be open only when a flame exists. This thermocouple is installed close to the pilot assembly, and it confirms that the pilot is operating. It facilitates combustion by stopping the flow of gases in case the pilot flame is suppressed.