Description
Lennox 56L32 Pressure Switch Overview
The Lennox 56L32 is a precision-engineered pressure switch designed for use in Lennox heating systems. With a set point of .36″ water column (wc), this switch monitors draft pressure to ensure safe and efficient furnace operation. Its single-pole, single-throw (SPST) design provides a clean, reliable switching action that protects the heat exchanger and combustion system by verifying proper inducer operation before allowing the burner to fire.
Key Features
- Set Point: .36″ w.c. (water column)
- Switch Type: SPST (Single-Pole, Single-Throw)
- Connection: 1/4″ barb fitting for secure hose attachment
- OEM Lennox replacement part — ensures compatibility with applicable Lennox furnace models
- Monitors inducer/draft pressure for safe furnace startup and operation
- Helps prevent unsafe operation if proper draft pressure is not established
Application
This pressure switch is a direct OEM replacement for qualifying Lennox furnaces. It is a critical safety component in the furnace control sequence, confirming that the inducer motor has established adequate negative pressure before the ignition sequence begins. Proper pressure switch function protects the heat exchanger from overheating and prevents the release of combustion gases into the living space.
Installation Notes
- Always verify compatibility with your specific Lennox furnace model before installation
- Disconnect power to the unit before servicing or replacing the pressure switch
- Inspect the 1/4″ barb hose connection and tubing for cracks or blockages during replacement
- Consult the furnace service manual for proper wiring and mounting procedures
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