Lennox Y9894 Control Board

The Lennox Y9894 Control Board is a high-performance integrated furnace control designed for precise ignition sequencing and fan motor regulation in Lennox G50 and G1 series gas furnaces. As a direct replacement ignition board, it consolidates multiple older revisions into a single, robust hardware platform. This 24V AC module manages the hot surface igniter (80V AC output), inducer motor, and blower operations with advanced logic to ensure efficient combustion and safety. HVAC contractors favor this OEM-spec component for its integrated diagnostics, which utilize LED error codes to streamline troubleshooting in the field. The board features standard terminal designations (C, R, W, Y, G) and is engineered for use with permanent split capacitor (PSC) blower motors. By utilizing the Lennox Y9894 ignition control, technicians ensure full factory-level compatibility and maintain the pressure switch monitoring and flame sensing integrity required for reliable HVAC furnace repair. This board is the definitive Lennox furnace parts replacement for systems requiring high-reliability switching and steady-state performance.

• Lennox: 30W25, 30W2501, 69M15, 69M1501, 100925-03, 100925-02, 100925-01, 17W92, 17W9201, 23W51, 23W5101, 69M08, 69M0801
• White-Rodgers: 50A66-123-04, 50A66-743, 50A66-122, 50A66-123

• Simplified Inventory: One board replaces over a dozen legacy Lennox and White-Rodgers part numbers.
• Enhanced Diagnostics: On-board LED flashes specific fault codes, reducing time spent on furnace troubleshooting.
• OEM Precision: Direct factory fitment ensures mounting standoffs and wiring harnesses align perfectly with existing G50 and G1 cabinets.
• Reliable Ignition: Advanced timing for 80V hot surface igniters reduces premature igniter wear and nuisance lockouts.

What does the Lennox Y9894 control?
This integrated board manages the entire heating cycle, including the inducer motor pre-purge, hot surface igniter warm-up, gas valve energization, and the blower motor timing for både heating and cooling cycles.

Is the Y9894 compatible with twinning applications?
No, this specific control board is not designed for twinning. It is intended for single-furnace applications in residential and light commercial settings.

How do I read the error codes on this board?
The board features an onboard LED. A steady flash or specific sequence of pulses corresponds to fixed diagnostic tables (e.g., pressure switch stuck open, limit switch lockout) located on the furnace's wiring diagram or service manual.

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.