Lennox 12L20 Pressure Switch 326070-701 this valve is engineered to

this valve is engineered to handle a 250 PSI maximum inlet pressure while providing a wide 25-90 PSI adjustable outlet pressure range

Supports consistent BTU output and clean combustion to protect the secondary heat exchanger

Heavy-Duty Immersion Design: Built to handle the high-cycle demands of commercial water heaters and large-scale Copper-Fin II hydronic boilers

blue flame that maintains proper thermocouple/thermopile voltage

this 240V resistive heating assembly ensures precise thermal transfer within the air handler

Lennox 12L20 Pressure Switch 326070-701 this valve is engineered toThe Lennox 12L20 Pressure Switch is a critical OEM HVAC safety control designed to protect the compressor and refrigeration circuit from catastrophic failure. As a 590 PSI high pressure switch, it operates on a Normally Closed (N C) logic, meaning the internal contacts are closed during standard operation and snap open to kill the control circuit when discharge pressure exceeds the factory setpoint. This Lennox replacement part ensures the system