preventing hazardous leaks and maintaining AEO-ranked energy efficiency

DSI (Direct Spark Ignition)

including the FX

ensuring optimized centrifugal force to maintain consistent static pressure and airflow across your indoor coils

Refer to the Danfoss selection software or nominal capacity tables to match the No

Lennox 34M73 Pressure Switch 321702-401 preventing hazardous leaks and maintainingThe Lennox 34M73 Pressure Switch is a critical safety component designed for precise furnace draft inducer monitoring in residential and commercial heating systems. This OEM Lennox replacement part is factory calibrated to a . 22"wc set point, ensuring the exhaust vent maintains adequate negative pressure before allowing the ignition sequence to proceed. Featuring a Single Pole Single Throw (SPST) configuration and a standard 1 4" barb connection,