Lennox 36W49 Pressure Switch Overview
The Lennox 36W49 is a factory-specified .55″ pressure switch (OEM part number 65324900) designed to maintain safe and efficient furnace operation. As a critical safety component, this pressure switch monitors the negative pressure created by the inducer motor during each heating cycle, confirming proper venting and combustion airflow before allowing the burners to ignite.
Key Features
- OEM Lennox replacement pressure switch — part number 65324900
- .55″ water column (W.C.) setpoint for precise pressure sensing
- Designed to verify inducer motor operation and proper venting before burner ignition
- Helps prevent unsafe furnace operation due to blocked flue, failed inducer, or restricted airflow
- Direct OEM fit for compatible Lennox furnace models — no modifications required
- Built to Lennox quality standards for long-lasting, dependable performance
Application
This pressure switch is engineered as a direct OEM replacement for select Lennox gas furnaces. It is a key safety interlock in the furnace control sequence, protecting against hazardous conditions such as flue gas spillage or incomplete combustion. Always verify compatibility with your specific Lennox furnace model before installation.
Why Choose OEM Lennox Parts?
Using genuine Lennox OEM components ensures your equipment operates within factory specifications, preserving equipment warranties and delivering the reliability your customers expect. The Lennox 36W49 pressure switch is the correct, tested solution for maintaining peak furnace safety and performance.
