Suburban 525003 Furnace Low Air Flow Sail Switch for SF & SFV

Maintain proper ignition and safe furnace operation with the Suburban 525003 Furnace Low Air Flow Sail Switch. This brand new genuine Suburban OEM replacement sail switch is designed for a wide range of Suburban SF, SFV, and SH series RV furnaces. The sail switch is an important safety component that verifies sufficient blower airflow before allowing ignition, helping ensure the correct air and gas mixture for reliable furnace operation.

Manufactured to original Suburban specifications, this direct replacement restores proper airflow sensing and dependable furnace performance.

Features

• Genuine Suburban 525003 OEM replacement part
• Brand New
• Furnace low air flow sail switch (air proving switch)
• Verifies blower reaches approximately 75% operating speed before ignition
• Helps ensure proper combustion air flow for safe operation
• Direct replacement for worn or failed sail switches
• Durable OEM construction for long service life
• Replaces Suburban part numbers 232261 and 233382

Specifications

• Manufacturer Part Number: 525003
• Product Type: Furnace Low Air Flow Sail Switch
• Function: Air Proving / Air Flow Safety Switch

What's Included

• (1) Furnace Low Air Flow Sail Switch

Compatibility

Compatible with Suburban RV furnaces manufactured after serial number 924201894, including:

• SF-20, SF-20F, SF-20FQ, SF-20Q
• SF-25, SF-25F, SF-25FQ, SF-25Q
• SF-30, SF-30F, SF-30FQ, SF-30Q
• SF-35, SF-35F, SF-35FQ, SF-35Q
• SF-42, SF-42F, SF-42FQ, SF-42Q
• SFV-20, SFV-20Q, SFV-20FQ
• SFV-25, SFV-25Q, SFV-25FQ
• SFV-30, SFV-30Q, SFV-30FQ
• SFV-35, SFV-35Q, SFV-35FQ
• SFV-42, SFV-42Q, SFV-42FQ
• SH-42, SH-42F

Note: Only compatible with furnaces having serial numbers after 924201894. Please verify your furnace model, serial number, and existing part number before ordering.

Installation Notes

• Genuine OEM Suburban replacement component
• Install as a direct replacement for the original sail switch
• Disconnect power and propane before servicing the furnace
• Inspect the blower wheel, motor, ducts, and switch paddle for obstructions or damage before replacement

Warranty

• Limited 90-Day Supplier Warranty