Description
The Lennox 14A47 is an OEM replacement two-stage pressure switch engineered to deliver precise, reliable pressure sensing for Lennox furnace and air handler applications. Designed with set points of +.55″ W.C. and -.35″ W.C., this switch monitors the pressure differential produced by the draft inducer motor to verify proper venting before allowing ignition to proceed — a critical safety function in modern gas furnace systems.
Key Features
- Two-stage pressure switch with .55″ and -.35″ W.C. set points
- OEM Lennox replacement part (SKU: 14A47)
- Monitors draft inducer pressure to confirm safe venting conditions
- Prevents furnace ignition if improper venting or blocked flue is detected
- Direct drop-in replacement for compatible Lennox furnace models
- Durable construction for long-term, dependable performance
Application
This pressure switch is designed for use in Lennox two-stage gas furnaces where dual pressure monitoring is required. It works in conjunction with the draft inducer assembly to ensure that the flue gases are being properly exhausted before the ignition sequence is initiated. Always verify compatibility with your specific Lennox furnace model number before installation.
Why Choose the Lennox 14A47?
Using genuine OEM or OEM-equivalent pressure switches ensures your furnace operates within manufacturer specifications, maintaining system efficiency, warranty compliance, and — most importantly — the safety of the occupants. The 14A47 is a trusted solution for HVAC technicians performing service and maintenance on Lennox two-stage heating systems.
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