Robertshaw 41-408 Hot Surface Ignitor

The Robertshaw 41-408 Hot Surface Ignitor is a high-performance silicon carbide furnace igniter engineered for precision in HVAC gas ignition systems. Built with high-purity recrystallized silicon carbide, this 120V HSI replacement offers superior thermal and physical strength, maintaining stable electrical properties even under extreme cycling conditions. Featuring a Norton 271N factory configuration, it is designed for a rapid 17-second heat-up time to ensure efficient combustion across residential and commercial heating equipment, including boilers, unit heaters, and rooftop units. The 18-gauge nickel-chrome lead wires are metalized in place for maximum holding strength and optimized electrical conductivity, protected by high-temperature fiberglass insulation rated for up to 392°F. This unit serves as a direct technical cross-reference for numerous OEM parts, including various Rheem, Trane, and Lennox models, providing technicians with a reliable, durable solution for field service calls.

Key Benefits

• OEM Compatibility: Engineered as a direct drop-in for Robertshaw 41-408N, Rheem 62-22441-01, and Trane IGN34, minimizing field modification time.
• Rapid Heat-Up: Reaches optimal ignition temperature in under 17 seconds to ensure consistent light-offs and reduce gas valve open-time.
• High-Durability Leads: Equipped with 18 AWG nickel chrome wires and fiberglass sleeving for enhanced protection against high-heat stress and chemical degradation.
• Reliable Construction: Crystalized silicon carbide (Crystar) provides the thermal shock resistance necessary for long-term operation in demanding environments.

Common Questions

What is the ceramic block style and lead length for the 41-408?
This model utilizes a Style B ceramic block and comes with 5-1/4 inch lead wires terminated with a Type C connector for a secure electrical interface.

Can I use this in a 240V system?
While some control modules are rated for 208/240V input, they typically step the voltage down to 120V AC for the ignitor. This component is specifically designed for 120V operation.

What causes these ignitors to fail prematurely?
Physical handled oils (fingerprints) or improper mounting can lead to hot spots. Ensure the silicon carbide element is never touched during installation and that the bracket is properly aligned to the burner port.

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.