Lennox 71W44 Limit Switch 340793-762 Safety Integrity: Prevents "no-heat" calls

Safety Integrity: Prevents "no-heat" calls by maintaining reliable flame rectification signals to the furnace ignition module

the Carrier LA21RB556 is the official direct replacement for the discontinued LA21RB554 blower wheel and meets all original specifications

rated for a PN 16 nominal pressure and a maximum differential pressure of 10 bar

the enclosure supports either DIN rail mount or direct wall installation

Its rugged construction ensures precise setpoint stability even in high-vibration environments commonly found in mechanical rooms

Lennox 71W44 Limit Switch 340793-762 Safety Integrity: Prevents "no-heat" callsThe Lennox 71W44 Limit Switch is a critical OEM safety component engineered for precise thermal regulation in residential gas furnaces and air handlers. This L145 30F limit switch is designed to monitor discharge air temperatures, automatically breaking the electrical circuit if the internal plenum temperature exceeds the 145F safety threshold. Once the system cools to 115F, the switch features an automatic reset function to restore operation without