Robertshaw 41-403 Hot Surface Ignitor

The Robertshaw 41-403 Hot Surface Ignitor (271M) is a heavy-duty silicon carbide igniter designed for consistent ignition in 120V AC heating systems. As a veteran-grade furnace replacement part, this unit features high-purity recrystallized silicon carbide construction (Crystar™), providing the structural integrity needed for demanding cycles in boilers, rooftop units, and infrared burners. It serves as the direct Robertshaw 41-403 cross reference for the 41-403N; however, technicians should note that this specific model is a carbide-based component, not a nitride upgrade. The 41-403 ignitor reaches operational temperatures within 17 seconds, utilizing 18-gauge nickel chrome lead wires with high-temperature fiberglass insulation for superior thermal protection. With a Style C ceramic block and 5.5-inch leads, this Robertshaw ignitor ensures a precise fit for 271M factory specifications, delivering the reliable performance required for professional HVACR maintenance.

• Direct OEM Match: Engineered as a high-performance replacement for factory part number 271M and Robertshaw 41-403N.
• Thermal Strength: Constructed from high-purity recrystallized silicon carbide to resist oxidation and physical wear.
• Fast Ignition: Optimized to reach full ignition temperature in approximately 17 seconds for efficient burner light-off.
• Technical Build: Features 18-gauge nickel chrome lead wires and a durable 2-inch wide ceramic block for easy mounting.
• Electrical Protection: Integrated fiberglass sleeve protects internal wiring from high-heat exposure within the combustion chamber.

Is the 41-403 compatible with 240V systems?
While the ignitor operates at 120V AC, many control modules rated for 208/240V input will step the voltage down to 120V. Always verify the output voltage at the ignitor terminals before installation.

Can I use this to replace a nitride-style ignitor?
The 41-403 is a silicon carbide ignitor. If your system requires a nitride-specific element for longevity or different current-sensing properties, verify compatibility, as this carbide model has different resistance characteristics.

Are the wires long enough for deep burners?
This model comes with 5.5-inch lead wires. If your specific furnace or boiler assembly requires longer runs, you may need a different Robertshaw 41-series model or a universal kit with longer leads.

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.