Lennox 56W61 Ignitor

The Lennox 56W61 Hot Surface Ignitor is a high-performance 120V silicon nitride ignitor designed for precision ignition in residential and commercial Lennox gas furnaces. Engineered to replace fragile older models, this genuine OEM furnace igniter features a robust Coorstek R100997-02 design with a durable protective cage, ensuring reliable combustion under demanding cycles. As a critical component for heat initiation, the 56W61 ignitor provides a consistent thermal response to signal from the furnace control board, effectively igniting gas burners. This unit is widely used across various Lennox heating systems and cross-references with part numbers like R44744-002, R44744-001, and 20310501. For field technicians, the 2-pin plug and 6.1-inch lead length allow for a direct-fit installation. To ensure long-term reliability, always handle the hot surface ignitor by its ceramic base; skin oils can lead to hotspots and premature failure of the element.

• Universal Compatibility: Serves as a direct Lennox replacement part for numerous Aire-Flo, Armstrong, Concord, and Ducane models.
• Durable Construction: High-grade silicon nitride material offers superior mechanical strength compared to traditional silicon carbide ignitors.
• Direct Fit: Comes with a pre-installed mounting bracket and 2-pin terminal plug for rapid field replacement.
• Consistent Ignition: Precisely calibrated for 120-volt operation to ensure immediate burner ignition during every call for heat.

Is the 56W61 compatible with my specific furnace model?
This ignitor is a standard 120V component used in many Lennox and Allied Air brand units. Verify your existing part number or cross-reference the R100997-02 number on your current ignitor to confirm a match.

Can I touch the ignitor element during installation?
No. You must handle the part by the ceramic block only. Contamination from skin oils can cause the silicon nitride element to fail prematurely when it reaches operating temperature.

What are the symptoms of a failing Lennox ignitor?
If your furnace is not heating but the inducer motor is running, or if you see the ignitor glow briefly and then fade without ignition, the 56W61 may be cracked or have high resistance, requiring replacement.

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.