Lennox 12W49 Pressure Switch L99H008 preventing mechanical binding

preventing mechanical binding

The unit is built to ANSI Class 250 standards

The hermetic design and integrated sensing bulb allow for consistent performance in various mounting orientations

Automatic Reseating: Features non-mechanical seat-to-disc alignment and a test lever for straightforward maintenance and operational safety

Lennox 12W49 Pressure Switch L99H008 preventing mechanical bindingThe Lennox 12W49 Pressure Switch (Model R20558702) is a critical OEM safety component engineered for precise combustion air monitoring in Lennox gas furnaces. This SPST pressure switch is factory calibrated to actuate at 1. 35" W. C., ensuring the inducer motor generates sufficient draft for safe venting before the ignition sequence begins. Designed for professional grade reliability, it features a standardized 1 4" barb connection for secure