The Lennox 33J88 (33J8801) Pressure Switch is a genuine OEM safety and control component used in select Lennox residential heating systems. It ensures proper furnace operation by monitoring pressure levels within the combustion airflow pathway. When pressure is outside the required range, the switch signals the furnace control system to prevent unsafe or inefficient operation.

This replacement switch is engineered to Lennox specifications, ensuring accurate performance, long-term reliability, and seamless compatibility with approved models.

 

Features:

 

• Genuine Lennox OEM replacement pressure switch
• Monitors system draft and airflow for safe furnace operation
• Prevents furnace ignition issues caused by incorrect pressure levels
• Durable, high-quality construction for long service life
• Designed for direct-fit replacement and easy installation
• Suitable for residential Lennox furnaces requiring part number 33J88 / 33J8801

 

Specifications:

 

• Part Number: 33J88
• Catalog Number: 33J8801
• Component Type: Pressure Switch
• Function: Monitors airflow/draft pressure for furnace safety
• Switch Type: Normally open (closes on correct pressure)
• Application: Residential heating systems
• Compatibility: Selected Lennox furnaces (see list below)