Lennox 33J89 Furnace Pressure Switch

The Lennox 33J89 Furnace Pressure Switch is essential for safe, reliable furnace operation. This Type Pressure Switch is used on furnaces to monitor draft and trigger a shutdown if unsafe conditions are detected, protecting your home and equipment.

Designed as a durable, compatible furnace replacement part, the 33J89 serves as a critical HVAC safety sensor in Lennox systems. When paired with the furnace control board, it helps ensure proper ignition and airflow management, reducing the risk of improper operation and carbon monoxide exposure. This pressure switch is easy to install for experienced technicians and contributes to long-term reliability of your heating system.

• Model: Lennox 33J89
• Type: Pressure Switch
• Function: Monitors draft, signals safe ignition or shutdown
• Compatibility: Designed for select Lennox furnaces
• Durability: Built for reliable, long-term use