Fenwal 22-100001-021 Electrode Assembly

The Fenwal 22-100001-021 Electrode Assembly is a critical ignition component engineered for high-performance HVAC gas ignition systems. This direct spark ignition (DSI) electrode is designed to provide stable flame sensing and reliable spark gap consistency in demanding thermal environments. As a veteran-grade Fenwal replacement part, it utilizes high-purity alumina ceramic insulation to prevent voltage leakage and ensure a concentrated arc for immediate burner ignition. The 22-100001-021 flame sensor and electrode configuration are built to withstand corrosive flue gases and thermal cycling, maintaining signal integrity back to the ignition module. For contractors performing preventative maintenance or emergency repairs, this direct spark ignition electrode ensures the system meets precise microamp rectification standards. Integrating the Fenwal ignition electrode into your service kit reduces diagnostic callbacks by ensuring the gas valve and control board receive consistent feedback for safe operation. This assembly is a drop-in solution for specific commercial and industrial heating applications requiring DSI electrode replacement.

• Durable Ceramic Insulation: High-dielectric alumina ceramic prevents flashover and ensures the spark occurs exactly at the burner head.
• Corrosion-Resistant Probe: The electrode rod is constructed from high-temperature alloys to resist oxidation and carbon buildup.
• Precise Flame Sensing: Optimized for flame rectification systems, providing the 22-100001-021 with highly accurate signal feedback.
• OEM Compatibility: Precision-formed mounting brackets allow for exact spark gap alignment without field modification.
• Industrial Build Quality: Designed to meet the duty cycles of heavy-duty gas-fired equipment and furnaces.

What causes a Fenwal 22-100001-021 to fail?
Failure is typically caused by carbon fouling, cracked ceramic insulation from physical impact, or excessive oxidation on the probe tip which inhibits the flame rectification signal.

Can the spark gap be adjusted on this electrode assembly?
While the assembly is factory-set for standard specifications, technicians should always verify the gap against the specific heater manufacturer’s requirements before final installation.

How do I clean the flame sensing rod properly?
Use a non-abrasive material like steel wool or a Scotch-Brite pad to remove oxidation. Avoid using heavy-grit sandpaper, as it can create grooves that encourage rapid carbon buildup.

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.