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Optimized System Logic: Ensures accurate ambient data for efficient heat pump defrost cycles and outdoor air temperature monitoring
integrated venturi
Quiet Operation: Precision-balanced internal components reduce vibration and audible noise during cycles
Standardized Fitment: Designed as a drop-in replacement for legacy Honeywell L6 controls
Lennox 12L20 Pressure Switch 320788-702 Optimized System Logic: Ensures accurateThe 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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