Resideo Q3451B1004/B Pilot Assembly

The Resideo Q3451B1004/B Natural Gas Pilot Assembly is a high-performance intermittent pilot burner designed for precise flame ignition and reliable sensing in S8600 series ignition systems. Engineering-grade construction features a single-rod combination spark igniter and flame sensor, which streamlines the HVAC combustion setup by utilizing one component for both sparking and monitoring. This assembly comes factory-equipped with a BCR-18 orifice (0.018 in.) and a left-tip configuration, making it a drop-in replacement for the legacy 412-075-000 model used in various Slant/Fin and residential heating applications. The integrated 36-inch lead ensures adequate reach for various cabinet geometries, while the B-style mounting bracket provides a secure, stable fit. With its non-primary aeration design and 1/4-inch compression fitting, this unit maintains a stable 1000 BTUH pilot flame, ensuring consistent main burner light-off even in demanding cold-start conditions.

• Direct Cross-Reference: 100% identical to part number 412-075-000 for simplified inventory management.
• Integrated Sensing: The single-rod Kanthal electrode serves as both the spark igniter and flame sensor to reduce wiring complexity.
• Application Versatility: Optimized for Natural Gas systems and fully compatible with Honeywell/Resideo S8600 series modules.
• Adjustable Flame Pattern: Features a three-position adjustable hood to direct the pilot flame for optimal sensor contact.

Common Questions

Is this part compatible with LP (Propane) systems?
No, the Resideo Q3451B1004/B is specifically configured for natural gas with the BCR-18 orifice. Converting to LP requires a different orifice assembly to ensure proper gas burner safety and pressure regulation.

Does this assembly include the compression fitting?
Yes, it includes a 1/4-inch compression fitting and the necessary orifice assembly for a standard intermittent pilot installation.

What should I check if the pilot sparks but won't light?
First, verify gas inlet pressure and inspect the BCR-18 orifice for debris. Ensure the B-style bracket is providing a solid ground path to the burner manifold, as a poor ground will prevent the S8600 module from sensing the flame.

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.