Lennox 17H18 – White-Rodgers 50T35-743 Integrated Furnace Control is an OEM electronic control board designed to manage and coordinate all critical furnace operations in compatible Lennox gas furnaces. This integrated furnace control provides precise timing and reliable control of ignition, gas valve operation, blower motor sequencing, and safety monitoring, helping ensure safe, efficient, and consistent furnace performance.

Manufactured by White-Rodgers (Emerson), the 50T35-743 control board is engineered to meet Lennox factory specifications, making it a direct replacement for the original control installed in select Lennox heating systems. It continuously monitors inputs from safety devices such as the pressure switch, limit switch, and flame sensor, and responds instantly to abnormal conditions by shutting down the system to protect the furnace and the home.

This integrated furnace control is commonly used to resolve issues such as no heat, intermittent ignition, improper blower operation, or furnace lockouts caused by a failed or malfunctioning control board. Designed for durability and long-term reliability, it supports dependable furnace operation through demanding heating seasons.

 

Key features:

• OEM Lennox furnace control board
• Manufactured by White-Rodgers / Emerson
• Integrated control for ignition, gas valve, and blower operation
• Monitors flame sensing and safety circuits
• Diagnostic LED indicators for easier troubleshooting
• Direct replacement with no modification required

 

Technical specifications:

Brand: Lennox
Manufacturer: White-Rodgers (Emerson)
Lennox catalog number: 17H18
Manufacturer part number: 50T35-743
Product type: Integrated furnace control board
Application: Gas furnace control and safety management

Compatibility:

Designed for use in select Lennox gas furnaces. Always verify compatibility using the furnace model number and service documentation before ordering.