Lennox 49K71 Limit Switch 318518-761 Designed for durability in demanding

Designed for durability in demanding HVACR applications

The Sensus 143-62-023-43 ensures stable lock-up performance and reduces the risk of pilot fluctuations or over-pressurization

as some setups utilize a separate integrated ignition control for the combustion air inducer

Industrial Build Quality: High-grade leads and specialized potting protect the internal thermistor from moisture and thermal fatigue

How do you adjust the pitch on this York sheave

Lennox 49K71 Limit Switch 318518-761 Designed for durability in demandingThe Lennox 49K71 Limit Switch is a critical safety component engineered for precision temperature monitoring in high output furnace and air handler applications. This OEM furnace limit switch is factory calibrated to an L220F trip point, ensuring the electrical circuit breaks immediately if internal temperatures exceed safe operating parameters. As a manual reset limit control, it requires a technician to physically intervene after a high limit event,