**Check serial number before ordering – this is the black sail switch for furnaces with S/N 72498929 and above. For S/N before 72498929, use part # DF31093**
Dometic 33082 Furnace Sail Switch With Bracket Upgrade Kit
This is a replacement sail switch for select Atwood AFM and AFL 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 insures 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.
Dometic Atwood Furnace AFM Series with Serial Numbers AFTER 72489156: AFMD25111, AFMD25121, AFMD25131, AFMD25141, AFMD25151, AFMD30111, AFMD30121, AFMD30131, AFMD30141, AFMD30151, AFMD35111, AFMD35121, AFMD35131, AFMD35141, AFMD35151
Dometic Atwood Furnace AFLD Series with Serial Numbers AFTER 72991127: AFLD35111, AFLD35121, AFLD35131, AFLD40111, AFLD40121, AFLD40131
Dometic Atwood Furnace AFLA Series with Serial Numbers AFTER 81689155: AFLA35211, AFLA35221, AFLA35231, AFLA40211, AFLA40221, AFLA40231
Dometic Atwood Furnace DFMD Series with Serial Numbers AFTER 72489156: DFMD25111, DFMD25121, DFMD25131, DFMD25141, DFMD25151, DFMD30111, DFMD30121, DFMD30131, DFMD30141, DFMD30151, DFMD35111, DFMD35121, DFMD35131, DFMD35141, DFMD35151
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