Description
Lennox 26W46 Two-Stage Pressure Switch Overview
The Lennox 26W46 is a two-stage pressure switch engineered for use in Lennox two-stage gas furnaces. Designed to monitor negative pressure generated by the inducer motor, this switch provides critical safety protection by verifying proper venting and combustion airflow before allowing ignition to proceed. With dual set points at 0.65″ WC and 1.15″ WC, it accurately supervises both the low-fire and high-fire stages of furnace operation, ensuring safe and efficient performance across all firing conditions.
Key Features
- Two-stage pressure switch with dual trip points
- Low-stage set point: 0.65″ WC
- High-stage set point: 1.15″ WC
- Designed for use with Lennox two-stage gas furnaces
- Monitors inducer motor negative pressure for safe ignition sequencing
- Helps prevent furnace operation under blocked flue or failed inducer conditions
- Direct OEM replacement for compatible Lennox furnace models
Application
The 26W46 pressure switch is a genuine Lennox OEM replacement part intended for two-stage residential and light commercial gas furnaces. It plays a vital role in the furnace safety circuit, confirming that the draft inducer is operating correctly at both low and high fire before the gas valve is permitted to open. Proper pressure switch function is essential for safe furnace operation and compliance with manufacturer specifications.
Why Choose the Lennox 26W46
- OEM-quality construction ensures accurate, reliable switching
- Dual set points match the demands of two-stage furnace operation
- Helps maintain manufacturer warranty compliance
- Straightforward drop-in replacement for faster service calls
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