Lennox 69W55 2-Stage Furnace Pressure Switch 0.20/0.55" W.C. OEM Replacement

The Lennox 69W55 is a genuine OEM 2-stage draft inducer pressure switch designed as a direct replacement for Lennox, Armstrong, and Ducane gas furnace systems. This pressure switch monitors the negative pressure created by the draft inducer motor and closes an electrical contact when fluid pressure reaches its designated set point, verifying that proper airflow and venting conditions are established before allowing ignition to proceed.

The 69W55 features a low-stage set point of 0.20" W.C. and a high-stage set point of 0.55" W.C., making it specifically engineered for 2-stage furnace operation where both low-fire and high-fire inducer speeds must be independently confirmed for safe burner ignition.

Key Features:

• Genuine OEM Lennox replacement pressure switch
• 2-stage operation with dual set points: Low 0.20" W.C. / High 0.55" W.C.
• Compatible with Lennox, Armstrong, and Ducane furnace systems
• Exact drop-in replacement for reliable, straightforward installation
• Ensures safe system operation by confirming adequate draft before ignition

Cross-Reference Part Numbers: 69W5501, 102737-03, 10273703

Replacing a faulty pressure switch with a genuine OEM Lennox part ensures the furnace retains its original performance ratings, safety certifications, and operational efficiency. This switch is a critical safety component — a failed pressure switch can prevent the furnace from starting or cause it to shut down unexpectedly.