Lennox 69W42 Limit Switch 318518-761 Remove the bottom seal cap

Remove the bottom seal cap and use the adjustment screw

Corrosion Resistance: Nickel-plated construction prevents premature lead failure due to high-heat oxidation

Corrosion mitigation prevents the buildup of rust and sediment

ensuring consistent superheat levels in both high and low ambient temperatures

Lennox 69W42 Limit Switch 318518-761 Remove the bottom seal capThe Lennox 69W42 Limit Switch, also identified as the L220 30 Limit Switch, is a critical OEM safety component engineered for precise thermal regulation within Lennox, Armstrong, and Ducane furnaces. This furnace high limit switch features a 220F opening threshold to interrupt the electrical circuit immediately upon detecting an over temperature condition, effectively preventing heat exchanger damage and ensuring operational safety. With an automatic