Fenwal 05-128981-048 Lead

The Fenwal 05-128981-048 Lead is a mission-critical 48-inch ignition lead designed specifically for integration with Fenwal direct spark ignition (DSI) systems and burner control modules. For veteran HVACR technicians, this lead provides the necessary 48-inch reach to maintain proper component layout in commercial boilers, water heaters, and industrial heating equipment. Built as a high-voltage flame sense wire extension, it ensures precise flame rectification signals are delivered back to the control board without interference. Measuring 4 feet in length, it is an essential OEM Fenwal replacement part for applications where standard shorter leads fail to bridge the gap between the electrode assembly and the DSI module. The 18 AWG stranded construction is optimized for the high-temperature environments typical of burner vesture areas, maintaining signal integrity and facilitating reliable trial-for-ignition sequences. Professional installers rely on this specific Fenwal wiring harness component for its seamless compatibility with 35-series and 05-series ignition platforms.

• Extended 48-Inch Reach: Ideal for large-scale appliance cabinets where the ignition control board is mounted away from the burner.
• High-Voltage Stability: Engineered to handle 15K to 25K volts of spark energy required for consistent burner lighting.
• Optimized Signal Conductivity: Matches Fenwal OEM specifications to prevent false flame drop-out or signal noise during operation.
• Contractor-Grade Durability: Features robust insulation designed to withstand the thermal stress of modern HVACR combustion chambers.

• Is this lead compatible with all Fenwal DSI modules? It is designed for use across multiple Fenwal ignition systems, including the 35-6x and 35-7x series, provided the terminal fittings match your specific electrode.
• Can this lead be cut to a shorter length? Shortening is not recommended as it may damage the specialized terminals; it is best to use the factory-terminated 48-inch length to ensure a secure, low-resistance connection.
• Does the 48-inch length impact spark energy? While Kidde-Fenwal generally recommends leads under 36 inches for maximum energy, this 48-inch flame sense wire is a factory-authorized length for specific appliances where the longer run is necessary and validated for performance.

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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.