Replacing a fouled or sticking Nordyne limit switch with this genuine OEM unit maintains the original factory specifications and helps troubleshoot common "limit circuit open" fault codes on integrated furnace control boards

Its unique 4-way flexing action effectively absorbs shock

The spring-actuated design ensures rapid seating and prevents water hammer

Robust Switching: Heavy-duty SPDT contacts rated for up to 16 FLA at 120 VAC

Lennox 69M40 Limit Switch 320788-702 Replacing a fouled or stickingThe Lennox 69M40 Limit Switch is a critical OEM safety component engineered for precise thermal monitoring in residential and commercial heating systems. This L170 40F limit switch operates on an automatic reset logic, featuring a fixed cut out temperature of 170F and a cut in temperature of 140F. Designed as a genuine Lennox replacement part, the 69M40 ensures consistent circuit interruption to prevent heat exchanger damage or hazardous overheating