Ignition Control Module | Replaces Pentair 472447 & Fenwal 35-662902-113

NBK-20839 Pool Heater Ignition Control Module – Direct Replacement for Pentair & Fenwal Ignition Systems

Restore reliable ignition performance to your pool or spa heater with the NBK-20839 Ignition Control Module. This high-quality replacement ignition control is engineered as a direct replacement for select Pentair and Fenwal ignition control systems, helping restore proper burner ignition, flame sensing, and heater operation.

Designed to replace several hard-to-find OEM ignition modules, the NBK-20839 provides a cost-effective solution for repairing pool and spa heaters experiencing ignition failures, intermittent operation, or no-heat conditions. This module is equivalent to Pentair 472447 and Fenwal 35-662902-113 ignition control systems commonly used in Pentair MiniMax NT heater applications.

Special Order Notice

Please verify all part numbers and heater model compatibility before ordering. Ignition control modules are electronic components and are non-returnable once installed.

Key Features:

• Direct Replacement Ignition Control Module
• Replaces Multiple Pentair & Fenwal OEM Part Numbers
• Restores Proper Ignition Sequence and Flame Monitoring
• Designed for Pool & Spa Heater Applications
• High-Quality Electronic Control Replacement
• Direct Fit Design for Compatible Systems
• Reliable OEM-Equivalent Performance
• Ideal for Repairing No-Ignition and Intermittent Ignition Problems

Specifications:

• Part Number: NBK-20839
• Product Type: Ignition Control Module
• Application: Pool & Spa Heater Ignition Control
• Function: Ignition Control / Flame Supervision
• Condition: New Replacement Part

Direct Replacement For:

Fenwal

• 35-662902-113
• 35662902113

Pentair

• 47-110-1780
• 472447
• 6273-0212
• PEN472447
• PUR-151-4101

The NBK-20839 is specifically listed as equivalent to these Pentair and Fenwal ignition control modules.

Compatible Heater Applications:

Pentair Pool & Spa Heaters

Commonly used with:

• Pentair MiniMax NT Standard (STD) Heaters
• Pentair MiniMax NT Low NOx (LN) Heaters
• DDTC Digital Controller Models
• 200, 250, 300, and 400 Series Heater Configurations (verify part number before ordering)

Common Symptoms of a Failed Ignition Control Module:

• Heater Will Not Ignite
• Intermittent Ignition Failure
• Burner Shuts Down Unexpectedly
• Ignition Lockout Conditions
• No Flame Signal Detected
• Heater Cycles Erratically
• No Heat Output

Important Fitment Notice:

• Verify all part numbers before ordering.
• Compare your existing ignition control module to the replacement module.
• Professional installation is recommended.
• Electrical troubleshooting may be required to properly diagnose ignition system failures.
• Heater model compatibility should always be confirmed using the manufacturer's parts diagram.

Why Replace Your Ignition Control Module?

The ignition control module is the brain of your heater's ignition system, controlling spark ignition, flame detection, and burner safety functions. A failing module can prevent your heater from operating correctly, resulting in no heat, ignition lockouts, or unreliable performance. Replacing a faulty ignition control restores dependable heater operation and proper safety monitoring.

Why Choose the NBK-20839 Ignition Control?

The NBK-20839 provides a dependable OEM-equivalent replacement for several discontinued and hard-to-find Pentair and Fenwal ignition control modules. Designed for direct compatibility and reliable operation, this replacement module helps extend the life of your pool heater while avoiding the expense of a complete heater replacement.

Shipping & Availability

• Brand New Replacement Ignition Control Module
• Carefully packaged to protect sensitive electronic components
• Processing time may require an additional 1–2 business days before shipment
• Verify compatibility before ordering to ensure proper fitment and operation.