preventing hazardous leaks and maintaining AEO-ranked energy efficiency

What are the symptoms of a failed York pressure switch

including the FX

DSI (Direct Spark Ignition)

This specialized part is vital for preventing common issues like low superheat or improper refrigerant metering during demanding cooling cycles

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,