Dometic 31093 RV Furnace Air Flow Sail Switch – AFS Series (White)

**Check serial number before ordering – this is the white sail switch for furnaces with S/N 72498929 and below. For S/N after 72498929, use part # DF33082**

This is a replacement sail switch for select Atwood AFS Series Furnaces. The sail switch is an air proving device. It is a safety component that will not let ignition occur until it sees 75% of the motor’s rpm’s. It ensures that the combustion wheel is rotating fast enough so that there is a proper air and gas mixture for smooth ignition.

When the paddle of the switch is depressed, there should be continuity through the switch. If a sail switch needs to be replaced, it should be replaced with the exact same size. The most common problems with these switches are bent paddles, loose wire connections or an obstruction between the paddle and switch contact.

Compatible with
Dometic Atwood Furnaces with Serial Numbers BEFORE 72498929: AFSAD12111, AFSD12111, AFSD16111, AFSD20111, AFSDA12121, AFSAD12121, AFSD16121, AFSD20121 AFSAD12131, AFSD12131, AFSD16131, AFSD20131 AFSAD12141, AFSD12141, AFSD16141, AFSD20141, AFMD16111, AFMD16121, AFMD16131, AFMD16141, AFMD16151, AFMD20111, AFMD20121, AFMD20131, AFMD20141, AFMD20151