Description
This low airflow sail switch is a direct replacement designed for specific Atwood Hydroflame AF and Dometic DF model furnaces manufactured after designated serial numbers. Engineered for reliable performance and safety, it monitors air movement in the furnace to ensure proper ignition and operation.
Compatible with the following furnaces (with serial numbers above specified thresholds):
Atwood AF Series
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AFMD: AFMD16111, AFMD16121, AFMD16131, AFMD16141, AFMD16151, AFMD20111, AFMD20121, AFMD20131, AFMD20141, AFMD20151, AFMD25111, AFMD25121, AFMD25131, AFMD25141, AFMD25151, AFMD30111, AFMD30121, AFMD30131, AFMD30141, AFMD30151, AFMD35111, AFMD35121, AFMD35131, AFMD35141, AFMD35151
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AFLA: AFLA35211, AFLA35221, AFLA35231, AFLA40211, AFLA40221, AFLA40231
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AFLD: AFLD35111, AFLD35121, AFLD35131, AFLD40111, AFLD40121, AFLD40121W, AFLD40131
Dometic DF Series
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DFMD: DFMD16111, DFMD16121, DFMD16131, DFMD16141, DFMD16151, DFMD20111, DFMD20121, DFMD20131, DFMD20141, DFMD20151, DFMD25111, DFMD25121, DFMD25131, DFMD25141, DFMD25151, DFMD30111, DFMD30121, DFMD30131, DFMD30141, DFMD30151, DFMD35111, DFMD35121, DFMD35121W, DFMD35131, DFMD35141, DFMD35151
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DFLA: DFLA35211, DFLA35221, DFLA35231, DFLA40211, DFLA40221, DFLA40231
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DFLD: DFLD35111, DFLD35121, DFLD35131, DFLD40111, DFLD40121, DFLD40131
🔧 Important: This version is intended for furnaces with serial numbers higher than:
• DFMD : 72489157 and above
• DFLA : 81689156 and above
• DFLD: 72991128 and above
Please visually compare your current sail switch to the product photo. If your unit uses the bent blade style, please order part number 31904 instead.
Key Features:
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Ensures safe furnace startup by detecting sufficient airflow
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Built for long-term durability in RV and marine environments
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Includes bracket for easy installation
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Compatible with a wide range of AFMD, AFLA, AFLD, DFMD, DFLA, DFLD models
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Limited 2-Year Warranty
This is a critical safety component for your RV furnace system. Always verify compatibility before ordering.
Fast shipping across Canada and the U.S.