521236 Suburban Blower Wheel 

Fits: SF-42/42F, SHD2542, SFV42Q/FQ (STARTING SERIAL NUMBER 194710772)

IN STOCK

Replaces: 350183

The Suburban 521236 Combustion Wheel is the updated OEM combustion‑air wheel used in newer SF‑series RV furnaces. This wheel delivers the precise combustion airflow required for proper ignition, flame stability, and safe furnace operation. It is used on specific SFQ/FQ and SFVH models that transitioned to the updated combustion‑housing design.

This wheel is not a universal SF‑series fit—it applies only to furnaces beginning at the serial‑number ranges listed below. Using the correct wheel ensures proper combustion air volume, prevents ignition lockouts, and maintains safe burner performance.

Key Features

• OEM Suburban combustion‑air wheel for updated SF‑series furnaces

• Correct diameter, width, and hub fit for the revised combustion housing

• Provides stable combustion airflow for reliable ignition

• Balanced for smooth, quiet operation

• Required for specific serial‑number ranges only

SF‑Series Furnaces Using 521236

• SF‑25Q / SF‑25FQ / SFVH‑25Q / SFVH‑25FQ

  • Starting Serial Number: 194500640

• SF‑30Q / SF‑30FQ / SFVH‑30Q / SFVH‑30FQ

  • Starting Serial Number: 194104640

• SF‑35Q / SF‑35FQ / SFVH‑35Q / SFVH‑35FQ

  • Starting Serial Number: 194411914

• SF‑42Q / SF‑42FQ

  • Starting Serial Number: 194203770

• SFV‑35Q / SFV‑35FQ

  • Starting Serial Number: 194203775

If a furnace falls below these serial numbers, it uses the earlier combustion wheel (commonly 350184 or 521235 depending on model).