Lennox 12W49 Pressure Switch L99H008 Relying on genuine Carrier blower

Relying on genuine Carrier blower wheels protects the longevity of the furnace’s heat exchanger and the air conditioner’s compressor by ensuring consistent

This OEM York replacement part is critical for residential and commercial units utilizing electronically commutated motor technology to maintain optimal airflow

The unit is built to ANSI Class 250 standards

Universal Mounting: Includes a flatted break-off shaft and standard mounting brackets for seamless replacement of OEM Robertshaw or Ranco controls

DSI (Direct Spark Ignition)

Lennox 12W49 Pressure Switch L99H008 Relying on genuine Carrier blowerThe 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