Lennox 12L20 Pressure Switch 323080-701 Technicians should verify if the

Technicians should verify if the existing air flow sensor cable requires replacement separately based on the specific diagnostic codes

What are the signs of a failing flue box

rated up to 155°C (311°F)

ensuring the inducer motor establishes a sufficient vacuum before allowing the ignition sequence to proceed

because it is a direct acting valve

Lennox 12L20 Pressure Switch 323080-701 Technicians should verify if theThe 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