Lennox 24W51 0.65/1.15″ WC Two-Stage Pressure Switch

Description

Lennox 24W51 Two-Stage Pressure Switch Overview

The Lennox 24W51 is an OEM two-stage pressure switch engineered for use in compatible Lennox heating systems. Featuring dual set-point operation at 0.65″ WC and 1.15″ WC, this switch monitors inducer and combustion air pressure to ensure safe, reliable furnace operation across both stages of heating. It provides critical protection by verifying that proper draft pressure is established before allowing ignition to proceed, helping prevent unsafe operating conditions.

Key Features

• Two-stage pressure switch with dual set points
• Set points: 0.65″ WC (Stage 1) and 1.15″ WC (Stage 2)
• OEM Lennox replacement part — direct fit for compatible Lennox furnace models
• Monitors inducer/combustion air pressure for safe furnace operation
• Prevents ignition under unsafe draft conditions
• Designed for reliable, long-term performance in demanding HVAC environments

Application

The Lennox 24W51 pressure switch is designed as a direct OEM replacement for compatible Lennox two-stage gas furnaces. It is a critical safety component that confirms adequate airflow through the heat exchanger and venting system before each ignition cycle. Always verify compatibility with your specific Lennox furnace model prior to installation.

Specifications

• SKU: 24W51
• Brand: Lennox
• Type: Two-Stage Pressure Switch
• Stage 1 Set Point: 0.65″ WC
• Stage 2 Set Point: 1.15″ WC