MC Enterprises | Sail Switch | 31093MC | For Select Atwood Models

Keep your RV furnace operating safely and efficiently with the MC Enterprise 31093MC RV Atwood Furnace Air Flow Sail Switch. Designed as a direct replacement for select Dometic Atwood AFS and AFM Series furnaces, this important safety component verifies proper airflow before allowing the ignition sequence to begin. The sail switch acts as an air-proving device by monitoring airflow generated by the furnace blower. When the blower reaches approximately 75% of its operating speed, the airflow moves the switch paddle and completes the electrical circuit, signaling that the combustion wheel is rotating fast enough to support the proper air-to-gas mixture for smooth and reliable ignition. If adequate airflow is not present, the switch helps prevent ignition from occurring. Built for dependable performance, the MC Enterprise 31093MC sail switch is an ideal replacement for a damaged, bent, or malfunctioning original switch. For proper operation, replacement sail switches should match the original component’s size and configuration. Features • Direct replacement air flow sail switch for select Dometic Atwood RV furnaces • Acts as an air-proving safety device during furnace startup • Helps prevent ignition until sufficient blower airflow is detected • Activates when the furnace blower reaches approximately 75% of operating speed • Supports proper air and gas mixture for smooth, reliable ignition • Helps promote safe and efficient furnace operation • Durable construction for dependable long-term performance • Ideal for replacing a damaged, bent, or malfunctioning sail switch • Designed to match the original switch size and configuration • Helps restore proper furnace airflow verification Common Sail Switch Issues • Bent or damaged switch paddle • Loose or damaged electrical wire connections • Debris or obstructions between the paddle and switch contact • Failure to achieve electrical continuity when the paddle is depressed Compatibility Compatible with select Dometic Atwood AFS and AFM Series furnaces with serial numbers before 72498929: • AFMD16111 • AFMD16121 • AFMD16131 • AFMD16141 • AFMD16151 • AFMD20111 • AFMD20121 • AFMD20131 • AFMD20141 • AFMD20151 • AFSAD12111 • AFSAD12121 • AFSAD12131 • AFSAD12141 • AFSD12111 • AFSD12121 • AFSD12131 • AFSD12141 • AFSD16111 • AFSD16121 • AFSD16131 • AFSD16141 • AFSD20121 • AFSD20131 • AFSD20141 Specifications • Manufacturer: MC Enterprise • Part Number: 31093MC • Product Type: RV Furnace Air Flow Sail Switch • Application: Dometic Atwood AFS and AFM Series Furnaces • Function: Verifies proper blower airflow before ignition • Serial Number Compatibility: Before 72498929 • Quantity: Single Sail Switch