York S1-2985-3181 Limit Switch Common Questions What causes a

Common Questions What causes a limit switch to trip repeatedly

Rated at 110-150 degrees

ensuring consistent furnace high-limit protection and preventing dangerous overheating conditions

preventing the short-cycling and blower run-on issues common with aged or fouled sensors

offering a direct drop-in replacement for worn spacers in commercial HVACR systems

York S1-2985-3181 Limit Switch Common Questions What causes aThe York S1 2985 3181 Limit Switch is a critical OEM safety component designed for high limit protection in residential and light commercial furnace applications. This 160 190F Auto Limit Switch features a primary safety circuit that opens when the internal plenum temperature reaches its 190F trip point, effectively de energizing the gas valve or heating elements to prevent heat exchanger damage or hazardous overheating. As an automatic reset limit