Lennox 61854 Burner Assembly

The Lennox 61854 is a critical OEM replacement pilot burner assembly engineered for high-performance gas-fired furnace systems. This natural gas pilot assembly features a precision-drilled .017 orifice, ensuring calibrated gas flow for reliable ignition cycles and stable flame rectification. Designed as a direct drop-in for several legacy and modern units, including Lennox G11 and G12 series furnaces, this component is the industry standard for maintaining combustion safety. As a veteran-grade HVAC replacement part, it replaces obsolete part numbers like 61477, providing a primary ignition source that integrates seamlessly with existing safety sensors and gas valves. The robust construction is built to withstand high-temperature environments, preventing common ignition lockouts and delayed ignition issues often found in aging residential heating equipment.

• Precision Orifice: The .017 orifice size provides exact fuel metering for natural gas applications, optimizing efficiency and startup reliability.
• Broad Compatibility: Engineered for Lennox furnace ignition systems, specifically validated for G11-200-2, G12D-110-1, and G12Q3-110-4 models.
• OEM Integrity: Utilizing a genuine Lennox 61854 burner assembly ensures the system maintains its original equipment specifications and safety ratings.
• Stability: Delivers a consistent pilot flame to ensure rapid main burner ignition and steady thermopile or sensor feedback.

Is the Lennox 61854 compatible with propane (LP) systems?
No, this specific assembly is factory-configured with a .017 orifice dedicated to natural gas. For LP conversions, a different orifice and assembly are required to meet pressure and flow specifications.

What are the symptoms of a failing 61854 pilot assembly?
Common indicators include frequent furnace lockouts, a weak or yellow pilot flame, or failure of the main burner to ignite despite the pilot being lit. These issues are often caused by soot buildup or a clogged 0.017 orifice.

Can I use this to replace the obsolete Lennox 61477?
Yes, the 61854 is the verified direct cross-reference replacement for the discontinued 61477 pilot burner, maintaining the same mounting and performance characteristics.

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.