Durable Construction: Engineered to withstand high-cycle thermal environments

By providing precise feedback to the system controller

ensuring that exhaust gases are safely vented before the ignition sequence begins

Over-torquing can damage the valve body

The integrated shunt facilitates specialized wiring configurations

Rheem-Ruud 47-21900-13 Limit Switch Durable Construction: Engineered to withstandThe Rheem Ruud 47 21900 13 Limit Switch is a critical safety component designed for precise thermal regulation in high efficiency furnace applications. This fixed temperature limit control features a 150 degree Fahrenheit open temperature set point, making it essential for preventing heat exchanger overheating. Engineered as a manual reset limit switch with an SPST normally closed circuit configuration, this part ensures the burner circuit opens