Lennox 69W42 Limit Switch 318518-761 the 05-01673-00 is strictly for

the 05-01673-00 is strictly for the 3-inch E2 frame

as a complete thermostatic expansion valve

maintaining a stable 7-11" wc outlet pressure even under fluctuating inlet conditions up to 5 PSI

Remove the bottom seal cap and use the adjustment screw

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

Lennox 69W42 Limit Switch 318518-761 the 05-01673-00 is strictly forThe 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