Fenwal 05-100000-250 Electrode

As a seasoned technician, you know that consistent spark and reliable flame monitoring are the backbone of any commercial or residential burner system. The Fenwal 05-100000-250 Electrode is a high-performance HVAC ignition component designed for those who demand OEM-grade reliability in gas furnace and boiler applications. This assembly features a robust standard electrode integrated with a high-voltage wire (H.V. wire), engineered to withstand the thermal stress of repeated ignition cycles without degrading the spark gap or insulation integrity. Built with glazed Alumina ceramics and high-temp rod metals, this Fenwal igniter ensures rapid burner stabilization by delivering a high-energy discharge precisely where it’s needed in the flame envelope.

When you're dealing with direct spark ignition (DSI) systems, the 05-100000-250 serves as a critical interface for both ignition and flame rectification. It is compatible with a wide range of gas ignition controls, providing the consistent flame sensing current required to prevent nuisance lockouts. Whether you are performing a routine heating system maintenance call or a complete burner overhaul, this OEM replacement electrode offers the 0.125-inch spark gap accuracy necessary for efficient fuel combustion. Don't compromise your call-back rate with generic alternatives; use a burner igniter assembly that is built to handle the rigorous demands of industrial and residential HVACR environments.

• Consistent Spark Delivery: High-voltage wire ensures peak energy transfer for reliable gas furnace ignition.
• High-Temperature Durability: Constructed with Alumina ceramic insulation to resist cracking under intense heat.
• Universal Applicability: Standardized mounting makes it a versatile HVAC repair part for various boiler and furnace models.
• Precision Flame Sensing: Optimized for accurate flame rectification, reducing system diagnostic errors and lockout events.
• OEM Standards: Genuine Fenwal 05-100000-250 quality ensures proper fitment and reduces installation troubleshooting time.

What is the proper spark gap for this electrode?
The standard gap for the Fenwal 05-100000-250 is 0.125 inches (± 0.031 in). Always verify this gap before final installation, as electrodes are not field-adjustable and should be replaced if the spacing is compromised.

Can I use this for both spark and sense functions?
Yes, this standard electrode is designed to support single spark and sense applications where the high-voltage wire carries both the ignition spark and the return microamp signal for flame monitoring.

How do I troubleshoot a weak flame signal with this part?
Check for carbon buildup on the rod or cracks in the porcelain insulator. Ensure the burner is properly grounded, as the flame sensing circuit depends on a solid reference to the chassis ground.

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.