Honeywell 18 Inch Replacement Thermocouple for Gas Furnaces, Boilers and Water Heaters, CQ100A1021/U

The Honeywell CQ100A1021/U 18-Inch Replacement Thermocouple is a critical component designed for gas furnaces, boilers, and water heaters that utilize 30-millivolt systems. This thermocouple functions as a safety device, detecting the presence of a pilot flame and allowing the gas valve to open only when a flame is confirmed. Built with a heavy, long-lasting element, it is engineered for maximum durability and an extended operational lifespan in high-heat environments.

To ensure broad compatibility, the unit includes a universal adapter that allows for easy mounting on most pilot burners, including push-in, clamp-in, and screw-in types. The 18-inch lead provides ample length for various appliance configurations, and the design features positive positioning for a swift and secure installation process. By providing a reliable signal to the gas control system, this replacement part helps maintain the safe and efficient operation of home heating and hot water systems.