Lennox 49K71 Limit Switch 318518-761 Common Questions What is the

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Lennox 49K71 Limit Switch 318518-761 Common Questions What is theThe 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,