Lennox 14A52 – Lennox 104549-10 2-Stage Pressure Switch
High 0.90" W.C. / Low 0.55" W.C.
Genuine OEM Furnace Replacement Part

The Lennox 14A52 pressure switch (OEM part number 104549-10) is a factory-original 2-stage furnace pressure switch engineered to verify proper inducer draft before ignition. Designed with a high set point of 0.90" W.C. and a low set point of 0.55" W.C., this dual-stage pressure switch ensures accurate airflow monitoring and safe furnace operation in compatible Lennox heating systems.

This component plays a critical safety role by confirming that combustion gases are venting properly through the flue system before allowing the furnace to fire. If the correct pressure is not detected, the furnace control board prevents ignition, protecting the heat exchanger and maintaining system safety.

Using a genuine Lennox OEM pressure switch guarantees correct calibration, electrical compatibility, and direct-fit installation without modification.

Key Features and Benefits:

• Genuine Lennox OEM part – 14A52 / 104549-10
• 2-stage pressure switch for precise draft verification
• High set point: 0.90" W.C.
• Low set point: 0.55" W.C.
• Ensures safe furnace ignition sequence
• Factory-calibrated for accurate pressure sensing
• Direct replacement for compatible Lennox gas furnaces

Why Proper Pressure Switch Operation Matters:

A failing or out-of-calibration pressure switch can cause furnace lockouts, ignition failure, intermittent heating issues, or diagnostic error codes. Replacing it with the correct OEM Lennox 2-stage pressure switch restores proper safety sequencing and dependable heat operation.

This part is commonly replaced when troubleshooting:

• Furnace not igniting
• Inducer motor running but no flame
• Pressure switch open or stuck fault codes
• Short cycling during heat call

Specifications:

Brand: Lennox
Catalog Number: 14A52
OEM Part Number: 104549-10
Type: 2-Stage Furnace Pressure Switch
Set Point High: 0.90" W.C.
Set Point Low: 0.55" W.C.
Application: Gas Furnace Draft Verification

Always verify model compatibility before ordering. If you need assistance confirming fitment, the Beenimax Support Team is ready to help.

Buy Genuine Lennox 14A52 Pressure Switch from Beenimax:

When safety and performance matter, always choose OEM. At Beenimax, we supply authentic Lennox furnace replacement parts to contractors, service technicians, and homeowners who demand reliable heating performance. Fast shipping, real inventory, and knowledgeable support make ordering simple.

Restore safe furnace operation today with Lennox 14A52 – 104549-10 2-Stage Pressure Switch.