Description
Lennox 80W52 Pressure Switch Overview
The Lennox 80W52 is an OEM-grade pressure switch engineered for reliable furnace and air handler protection. With a set point of -0.60″ water column (w.c.), this switch accurately monitors draft inducer and combustion air pressure to ensure safe system operation. Its SPST (Single-Pole, Single-Throw) design provides a clean, dependable switching action, while the 1/4″ barb connection allows for straightforward hose attachment during installation or replacement.
Key Features
- OEM Lennox replacement pressure switch — SKU 80W52
- Set point: -0.60″ water column (w.c.)
- SPST (Single-Pole, Single-Throw) switching configuration
- 1/4″ barb port connection for easy hose attachment
- Monitors inducer and combustion air pressure for safe furnace operation
- Designed to prevent furnace operation under unsafe draft conditions
- Direct OEM replacement for compatible Lennox furnace models
How It Works
The pressure switch senses negative pressure created by the draft inducer motor. When the inducer establishes proper airflow, the switch closes, signaling the furnace control board to proceed with ignition. If the required pressure is not achieved — due to a blocked flue, failed inducer, or other fault — the switch remains open, locking out the system and preventing unsafe operation.
Application
This switch is a direct OEM replacement for select Lennox gas furnaces and heating systems. Always verify compatibility with your specific unit’s model and serial number before installation. Refer to the equipment’s wiring diagram and service manual for proper installation procedures.
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