Description
The Lennox 14A51 is an OEM replacement pressure switch engineered to deliver precise, dependable pressure sensing in Lennox heating systems. With dual setpoints of +.74″ W.C. and -.41″ W.C., this switch monitors the pressure differential produced by the draft inducer blower to verify safe combustion conditions before allowing the furnace to proceed through its ignition sequence.
How It Works
The pressure switch acts as a critical safety device in the furnace control sequence. It confirms that the draft inducer is operating correctly and that proper venting pressure is present. If pressure falls outside the specified range, the switch opens the control circuit, preventing ignition and protecting against unsafe operation such as blocked flue conditions or inducer motor failure.
Key Features
- OEM Lennox replacement part — direct-fit for compatible Lennox furnace models
- Dual setpoints: +.74″ W.C. (open) and -.41″ W.C. (close)
- Monitors draft inducer pressure for safe furnace operation
- Prevents ignition under unsafe venting or inducer fault conditions
- Designed for reliable, long-term performance in residential and light commercial heating systems
Application
- Compatible with select Lennox gas furnace models — verify compatibility with your unit’s model and serial number before ordering
- Ideal for service technicians performing routine maintenance or troubleshooting furnace lockout conditions
Specifications
- SKU: 14A51
- Brand: Lennox
- Open Setpoint: +.74″ W.C.
- Close Setpoint: -.41″ W.C.
- Type: Differential Pressure Switch
- Application: Gas Furnace Draft Inducer Pressure Sensing
Reviews
There are no reviews yet.