York S1-025-28670-003 Limit Switch featuring an automatic reset limit

featuring an automatic reset limit switch mechanism that closes once temperatures drop to 40°F

providing a much higher safety margin than standard window-grade glass

Optimized 24V Logic: Operates efficiently on standard 24V AC thermostat circuits with DPST-NO reliability

Once the temperature drops back down to 180°F

Verified Performance: Rated for up to 10HP at 230V (3-phase)

York S1-025-28670-003 Limit Switch featuring an automatic reset limitThe York S1 025 28670 003 Limit Switch is a critical safety component designed for precise thermal monitoring within York gas furnaces and residential air handlers. This automatic reset limit switch is engineered to operate within a specific 90 110F temperature range, ensuring the heat exchanger and plenum do not exceed safe operating parameters. When the sensed temperature hits the upper threshold, the internal bimetal disc opens the circuit to the