Check for 230V at the high-voltage lines and verified 24V signals from the thermostat before replacing

As an auto-reset temperature switch

the Maxon 47489 offers a reliable cross-reference for mission-critical burner maintenance

which prevents pressure switch lockout and maintains furnace combustion efficiency

York S1-025-51477-000 Limit Switch R-407C Check for 230V at theThe York S1 025 51477 000 Limit Switch is a critical safety component engineered for York furnace replacement and gas fired heating systems. This 130 160 auto reset limit switch is designed to meet strict OEM HVAC parts standards, providing a precise thermal cutoff to protect the heat exchanger from high temperature excursions. With an open temperature of 160F and a reset point of 130F, it ensures the system remains within safe operating parameters