Lennox 19W94 Ignition Control Kit

The Lennox 19W94 Ignition Control Kit is the essential OEM electronic ignition replacement for maintaining sequence-of-operation integrity in Lennox G24, G24M, and G25 series furnaces. This RAM-3MC2-03 control board serves as the critical interface for the direct spark ignition (DSI) system, managing the trial for ignition, flame sensing, and gas valve modulation. Engineered to replace legacy part numbers 19W9401, 20J8001, and 33J62, this kit integrates seamlessly into existing wiring harnesses. It features a diagnostic LED readout to streamline troubleshooting of lockout codes and flame signal strength. For service technicians, this Lennox furnace control module ensures precise timing for pre-purge and post-purge cycles, preventing unburned gas accumulation and ensuring reliable HVAC part compatibility across various high-efficiency residential units. Solid-state construction minimizes failure points common in older intermittent pilot relays, providing stable 24V signal output to the redundant gas valve.

• Direct OEM Replacement: Replaces obsolete 20J8001 and 33J62 ignition modules without the need for mounting modifications.
• Integrated Diagnostics: Features on-board LEDs to quickly identify flame failure or pressure switch errors.
• Enhanced Signal Stability: Advanced flame rectification circuitry ensures a consistent microamp signal to prevent nuisance lockouts.
• Simplified Installation: Standard spade terminal layout facilitates a rapid swap-out during emergency service calls.

What 19W94 troubleshooting steps should I follow if the LED indicates a lockout?
Confirm 24VAC at the transformer, verify a solid ground connection for flame rectification, and inspect the spark electrode gap before replacing the module.

Is this Lennox 19W94 kit compatible with older G24M models?
Yes, this is the designated factory replacement for the G24 and G25 series; always verify your specific serial number for pin-to-pin mapping.

Can I use this to replace a competitive brand DSI control?
No, this unit is specifically calibrated for Lennox sequence timings and voltage requirements. Always use OEM-spec controls to maintain UL certification.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.