Lennox 74W03 Ignition Control Module for Gas Furnaces

The Lennox 74W03 is an OEM ignition control module designed for Lennox gas furnaces. This critical component manages the ignition sequence, controlling the hot surface ignitor and monitoring flame sensing to ensure safe and reliable furnace operation.

Key Features:

• Direct OEM replacement part for Lennox furnace systems
• Controls hot surface ignition timing and sequencing
• Integrated flame sense monitoring for safe operation
• Solid-state electronics for reliable performance
• Direct plug-in connector for simplified installation

This ignition control board is engineered to Lennox specifications and provides precise control over the ignition cycle. When the thermostat calls for heat, the control energizes the hot surface ignitor, opens the gas valve at the proper time, and continuously monitors flame presence. If flame is not detected or is lost during operation, the control immediately shuts off the gas valve to prevent unsafe conditions.

Genuine Lennox replacement part ensures proper fit and function with your existing furnace system.