The Lennox 74W03 (103098-01) Control-Ignition module is an OEM ignition control board engineered for use in single-stage Lennox Elite gas furnaces. This module manages critical ignition and flame sensing operations to ensure safe, efficient startup and burner monitoring. Designed for direct compatibility with Lennox systems, it features integrated diagnostics for quick troubleshooting and system performance feedback.
Key Specifications:
- Part Number: 74W03
- Manufacturer Part Number: 103098-01
- System Type: Single-stage gas furnace control
- Voltage Input: 24 VAC (nominal), 50/60 Hz
- Ignition Type: Hot surface ignition (HSI)
- Flame Sense: Remote flame sensor input
- Operating Temperature Range: -40°F to 175°F (-40°C to 80°C)
- Control Features:
- Pre-purge and post-purge timing
- Flame rectification monitoring
- Lockout timing for safety
- On-board status LED for diagnostic fault codes
- Mounting: Multiple mounting hole options for OEM fit
- Compatibility: Factory-tested for Lennox Elite series furnaces, including G26 and G40 models (verify model-specific compatibility)