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The spring return fail-safe ensures the valve returns to the closed position during power loss
By managing the gas valve sequence and monitoring flame rectification
you need a reliable replacement that matches the original specs exactly
it is rated for DC-13 operational currents (e
Lennox 12L20 Pressure Switch 318973-401 The spring return fail-safe ensuresThe 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
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