Utica-Dunkirk 550003793 Pilot Assembly

The Utica-Dunkirk 550003793 Pilot Assembly is a critical OEM replacement component engineered for precise ignition sequences in residential and commercial gas-fired boilers. This standing pilot assembly features a durable thermopile and thermocouple configuration, ensuring consistent millivolt output to the gas valve for reliable flame rectification and safety monitoring. Designed specifically for Utica and Dunkirk hydronic systems, this unit replaces legacy pilot burners that have suffered from orifice clogging or sensor fatigue. The assembly includes a robust mounting bracket and high-temperature lead wires to withstand the thermal stresses of the combustion chamber. For field technicians, this boiler ignition component simplifies troubleshooting by providing a standardized flame pattern and stable conductivity. Whether you are performing a seasonal tune-up or a critical repair, utilizing this genuine HVAC replacement part ensures the manifold pressure and combustion efficiency remain within the manufacturer's specified tolerances for optimal heat exchanger performance.

• Direct OEM Fit: Eliminates the need for field modifications on Utica and Dunkirk boiler chassis.
• Integrated Flame Sensing: High-grade sensors provide immediate feedback to the control board to prevent gas buildup.
• Corrosion-Resistant Orifice: Precision-machined to maintain a steady pilot flame under varying line pressures.
• Hardened Construction: Built to withstand high-ambient temperatures near the burner tray without signal degradation.

Common Questions

What are the symptoms of a failing pilot assembly? Common indicators include a weak yellow flame, frequent pilot outages, or the boiler failing to initiate the main burner cycle despite a lit pilot.

Is this assembly compatible with LP or Natural Gas systems? This pilot is typically configured for natural gas; however, check the orifice stamping to confirm compatibility with your specific fuel type and manifold pressure.

Does this include the replacement mounting hardware? This assembly includes the integrated bracket; however, it is recommended to retain the existing mounting screws for your specific burner housing.

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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.