Lennox 29M74 Limit Switch 328140-751 specifically calibrated to maintain high

specifically calibrated to maintain high static pressure and balanced airflow across the coil

and York gas-fired systems

Key Benefits Dual Coil Voltage: Versatile 24 Vac/dc or 120 Vac input simplifies field wiring and reduces inventory overhead

preventing nuisance tripping while providing reliable high-limit protection

Lennox 29M74 Limit Switch 328140-751 specifically calibrated to maintain highThe Lennox 29M74 Limit Switch is a critical fixed temperature safety component engineered for Lennox furnace flame rollout and primary limit protection. This SPST (Single Pole Single Throw) thermal switch is rated for a 140F trip point with a 30F differential, ensuring precise furnace cycling and preventing heat exchanger damage. Designed as a direct OEM replacement limit switch, the 29M74 features a 1 inch insertion depth and 1 4 inch quick connect