Suburban 520947 Ignition Control Circuit Board – 24V AC (P-30S / P-40S / N-30M Furnaces)

Product Overview

The Suburban 520947 Ignition Control Circuit Board is a direct replacement module designed for select Suburban 24 Volt AC furnaces, including P-30S, P-40S, and N-30M models. This board controls the full ignition process, including spark generation, gas valve operation, and flame sensing.

If your furnace is experiencing ignition failure, intermittent heating, or system lockouts, replacing the control board with the 520947 can restore proper operation and reliable performance.

This is a 24V AC control board and is not compatible with standard 12V DC Suburban furnace systems.

Key Features

• Designed for Suburban 24V AC furnace systems
• Compatible with P-30S, P-40S, and N-30M models
• Controls ignition sequence, gas valve, and flame sensing
• Helps restore reliable furnace operation
• Resolves common ignition and lockout issues
• Direct OEM replacement for proper fit and function
• Durable design for long-lasting performance

Specifications

• Part Number: 520947
• Product Type: Ignition control circuit board
• Voltage: 24 Volt AC
• Application: Suburban RV furnaces
• Function: Ignition control and system operation

Compatible Furnace Models

• Suburban P-30S
• Suburban P-40S
• Suburban N-30M

Important Compatibility Note

This control board is designed for 24 Volt AC furnace systems only.

• Not compatible with 12V DC Suburban furnaces
• Not interchangeable with boards like 521099

Always verify your furnace voltage before ordering.

When Should You Replace the Control Board?

You may need the 520947 board if your furnace:

• Will not ignite (no spark)
• Attempts ignition but fails to stay lit
• Locks out after multiple ignition attempts
• Cycles improperly or shuts down unexpectedly
• Has inconsistent or unreliable heating

The control board is one of the most common causes of furnace ignition problems.

Why Choose the 520947 Board?

• Restores proper ignition and flame monitoring
• Ensures safe and reliable furnace operation
• OEM replacement for exact compatibility
• Designed specifically for 24V AC systems

FAQ

Will this work with 12V Suburban furnaces?
No, this board is strictly for 24 Volt AC systems only.

What models does this fit?
It fits Suburban P-30S, P-40S, and N-30M furnaces.

Is this interchangeable with the 521099 board?
No, the 521099 is a 12V DC board, while this is a 24V AC board.

Is installation difficult?
Installation is straightforward for those familiar with furnace components, but proper wiring and safety precautions are important.