The Lennox 14T65 pressure switch kit (OEM part number 104936-02) is a high-quality combustion air pressure switch designed for reliable performance in residential and light commercial HVAC systems. This pressure switch monitors draft and airflow in the combustion chamber and ensures safe operation of the burner system by verifying inducer blower performance before allowing ignition. With precise set points of 0.90 inches WC for high and 0.25 inches WC for low, this kit provides accurate and consistent performance to maintain system safety and efficiency.

This replacement combustion air pressure switch is engineered to meet Lennox OEM specifications for fit, form, and function. It is ideal for use with compatible Lennox gas furnaces and can be used as a direct replacement for worn or malfunctioning pressure switches that fail to maintain correct pressure signaling. The durable design and robust construction help extend service life and minimize downtime.

 

Key Features:

• OEM quality replacement for Lennox combustion air pressure switch applications
• Set point high: 0.90 inches WC and set point low: 0.25 inches WC for precise pressure monitoring
• Ensures proper inducer blower operation prior to ignition for safe furnace startup
• Durable construction for long-lasting performance and reduced service calls
• Easy to install in systems requiring this specific pressure range

 

Typical Applications:

This pressure switch kit is suitable for Lennox furnaces that specify a 0.90/0.25 WC combustion air pressure switch. It is commonly used in gas furnace systems where accurate pressure sensing is critical for safe and efficient operation.

Install this genuine Lennox replacement pressure switch to restore proper airflow monitoring and ensure furnace safety controls operate as designed. If your system is experiencing lockouts, erratic operation, or pressure switch faults, replacing the pressure switch with the correct Lennox 14T65 can help resolve these issues and improve overall system reliability.