Description
The Lennox 58H31 is a precision-engineered pressure switch designed as a direct OEM replacement for compatible Lennox furnace and HVAC systems. It provides critical safety monitoring by detecting proper inducer draft pressure, helping to protect the heat exchanger and ensure safe, efficient furnace operation.
Key Features
- Set point: 3.00″ water column (wc)
- Switch type: SPST (Single Pole, Single Throw)
- Dual 1/4″ barb port connections for reliable hose attachment
- Direct OEM replacement for Lennox furnace applications
- Monitors inducer motor draft pressure to verify safe operating conditions
- Helps prevent furnace operation if proper pressure is not established
- Compact design for straightforward installation in tight furnace cabinets
How It Works
The pressure switch monitors the negative pressure (draft) created by the inducer blower motor during furnace startup. If the required 3.00″ wc pressure threshold is not met — indicating a possible blocked flue, failed inducer, or other venting issue — the switch remains open, preventing the ignition sequence from proceeding. This safeguard protects against incomplete combustion and potential carbon monoxide hazards.
Application
- Designed for use in Lennox gas furnaces requiring a 3.00″ wc pressure switch
- Ideal for HVAC technicians performing maintenance, diagnostics, or component replacement
- Compatible with systems using 1/4″ rubber or silicone pressure hose connections
Why Choose the Lennox 58H31
Using a genuine Lennox OEM pressure switch ensures proper calibration, reliable switching action, and compatibility with your specific furnace model. Aftermarket substitutes may not meet the precise pressure specifications required for safe and code-compliant operation. Trust the 58H31 to deliver consistent performance season after season.
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