Description
Lennox 14A44 Two-Stage Pressure Switch
The Lennox 14A44 is an OEM-grade two-stage pressure switch engineered for use in compatible Lennox gas furnaces. Designed to monitor inducer and draft pressure, this switch provides a critical safety interlock that prevents ignition unless proper combustion airflow is confirmed — protecting both the equipment and the occupants it serves.
Two-Stage Operation
This pressure switch features dual set points at -0.60″ W.C. and -0.35″ W.C., corresponding to the low-stage and high-stage firing modes of a two-stage furnace. Each stage is independently monitored, ensuring the system only advances through the ignition sequence when the correct negative pressure is detected at each firing rate.
Key Features
- OEM Lennox replacement part — direct-fit for compatible two-stage furnace models
- Dual set points: -0.60″ W.C. (high stage) and -0.35″ W.C. (low stage)
- Monitors inducer/draft pressure to confirm adequate combustion airflow
- Acts as a safety interlock — shuts down ignition sequence if pressure is insufficient
- Helps prevent flue gas spillage and carbon monoxide hazards
- Durable construction for long service life in residential and light commercial applications
Application
The 14A44 pressure switch is intended as a direct OEM replacement for Lennox two-stage gas furnaces. Always verify compatibility with the specific furnace model number before installation. Proper draft pressure is essential for safe furnace operation — replace a faulty pressure switch promptly to restore system safety and efficiency.
Why Choose an OEM Pressure Switch?
Using a genuine Lennox OEM pressure switch ensures the correct set points, port sizing, and electrical ratings are maintained. Aftermarket substitutes may not match the precise calibration required for safe two-stage operation. The Lennox 14A44 delivers the reliability and accuracy your system was designed around.
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