Ignition Module – Replaces Fenwal 35-705701-103 – NBK-20539

NBK-20539 – Ignition Module – NBK The NBK-20539 Ignition Module is a dependable OEM-equivalent replacement designed for HVAC ignition control applications. This module helps ensure reliable burner ignition and consistent heating system performance. It is a direct replacement for the widely used Fenwal 35-705701-103 ignition module. Built to meet or exceed OEM specifications, the NBK-20539 provides a precise fit and dependable operation, making it an ideal solution for HVAC technicians servicing residential and light commercial heating equipment. Key Features OEM-Compatible Replacement: Direct replacement for Fenwal 35-705701-103 Reliable Ignition Control: Supports safe and consistent burner startup Durable Electronics: Built for long service life in HVAC environments Direct Fit Design: Helps simplify installation and reduce downtime Specifications SKU: 20539 UPC: 810069184296 Category: Ignition Module / Ignition Controls / HVAC OEM Brand: Fenwal Application: HVAC ignition control replacement Equivalent To Fenwal: 35-705701-103 Why Choose the NBK-20539? The NBK-20539 is a trusted ignition module replacement for HVAC professionals seeking OEM-level compatibility and dependable system performance. It helps restore proper ignition function and supports safe heating operation. Installation Tips Disconnect all power sources before servicing ignition control components. Verify the replacement module matches the original part number and wiring configuration. Inspect ignition leads and flame sensors for wear during installation. Test system startup after installation to confirm proper burner ignition. Pairs Well With Flame Sensors, Hot Surface Igniters, Gas Valves, HVAC Control Boards