The Robertshaw 41-412 Ignitor is a profession-grade silicon carbide hot surface igniter engineered for high-performance ignition across a wide range of gas-fired equipment. This 120V unit, often identified by factory part number 271NM, features a Style F ceramic block and a Type D terminal connector with 5-1/4 inch lead wires. Designed for rapid heat-up, this Robertshaw 41-412 replacement typically reaches ignition temperatures within 17 seconds, ensuring reliable combustion in residential furnaces, boilers, and rooftop units. The 18-gauge nickel chrome lead wires are metalized in place for superior electrical conductivity, while the high-temperature fiberglass insulation protects the wiring from the extreme thermal cycles common in HVAC applications. When performing a furnace ignitor repair, the 41-412 is a critical service part for technicians maintaining systems from manufacturers like Norton and White-Rodgers. Its high-purity recrystallized silicon carbide construction (Crystar) provides the physical and thermal strength required to withstand demanding duty cycles. Ensuring the correct hot surface ignitor voltage and mounting alignment is essential for system longevity and safe operation. For successful field HVAC part installation, avoid touching the carbide element with bare hands, as skin oils can create hot spots and lead to premature element failure. Key Benefits for Technicians: Universal Compatibility: Replaces Robertshaw 271NM and serves as a high-quality substitute for numerous OEM 120V ignition systems. Rapid Ignition: Designed to reach stable operating temperatures in under 17 seconds to minimize gas valve lag time. Durable Construction: Features high-purity silicon carbide and nickel chrome lead wires for consistent electrical resistance. High-Temp Protection: Lead wires are encased in professional-grade fiberglass insulation rated for high-ambient furnace environments. Common Questions: How do I check if my old igniter is bad? Use a multimeter to check for continuity or a specific resistance range (typically 40-75 ohms at room temperature for these carbide units). If the circuit is open or shows infinite resistance, the element is cracked and needs replacement. Can I use this 120V igniter in a 240V system? While some control modules are rated for 208/240V input, they must step the voltage down to 120VAC for this igniter. Always verify output voltage at the connector before installing to prevent immediate burnout. What does the 'Style F' block mean for installation? The Style F ceramic block is 1-1/4 inches wide. Ensure your mounting bracket aligns with this specific block style for secure positioning within the burner flame path. This item is not eligible for free shipping. 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.
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