Suburban 521052 Wiring Harness – P40 Furnace (For Use with 521099 Board) – Special Order

Product Overview

The Suburban 521052 Wiring Harness is designed specifically for the Suburban P40 RV furnace, allowing compatibility with the 521099 ignition control board to enable the fan control feature.

This harness is required when upgrading a P40 furnace to the newer 521099 control board. It ensures proper electrical connections between the furnace components and the module board, allowing the system to operate efficiently and reliably.

Built for a precise fit, the 521052 harness simplifies installation and helps prevent wiring issues during upgrades or repairs.

Key Features

• Designed for Suburban P40 furnace models
• Enables fan control functionality when used with control board 521099
• Required for upgrading P40 furnaces without fan control
• Provides secure and reliable wiring connections
• Helps ensure proper furnace operation and efficiency
• Reduces risk of electrical issues and improper wiring
• Direct-fit design for straightforward installation
• Special Order Item – Estimated 7–14 day lead time

Specifications

• Part Number: 521052
• Product Type: Fan control wiring harness
• Application: Suburban P40 RV furnace
• Function: Enables fan control integration with 521099 board

Compatible Furnace Models

• Suburban P40

Important Installation Note

This wiring harness is used to connect the Suburban 521099 ignition control board to the P40 furnace system in order to activate the fan control feature.

• The 521099 module board is NOT included and must be purchased separately
• Required when upgrading systems that do not already have fan control wiring

When Do You Need This Harness?

You will need the 521052 wiring harness if:

• You are upgrading a Suburban P40 furnace to the 521099 control board
• Your furnace does not have fan control wiring
• You are replacing damaged or missing wiring
• Your furnace fan control is not functioning after a board upgrade

Why This Harness Matters

• Ensures proper communication between furnace components
• Allows full functionality of upgraded control boards
• Prevents wiring mismatches and installation issues
• Helps extend furnace life and reliability

FAQ

Do I need this with the 521099 control board?
Yes, for P40 furnaces that do not already have fan control wiring, this harness is required.

Is the control board included?
No, the 521099 module board is sold separately.

Will this fit other Suburban furnaces?
No, this harness is specifically designed for the Suburban P40 furnace.

Is this item in stock?
This is a special order item with an estimated 7–14 day lead time.

Is installation difficult?
No, it is a direct-fit harness designed for straightforward installation.