[How to know you need to replace]---When your would run normally, if you hear the igniter begin to fire, then the furnace would light, then immediately go out.Maybe you can consider the problem of the sail switch
[How does it work]---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
[Compatible models]--- Replacement For Furnace AFM Series with Serial Numbers BEFORE 72489156: For AFMD25111, For AFMD25121, For AFMD25131, For AFMD25141, For AFMD25151, For AFMD30111, For AFMD30121, For AFMD30131, For AFMD30141, For AFMD30151, For AFMD35111, For AFMD35121, For AFMD35131, For AFMD35141, For AFMD35151
[Compatible models]--- Replacement For AFLA Series with Serial Numbers BEFORE 81689155: For AFLA35211, For AFLA35221, For AFLA35231, For AFLA40211, For AFLA40221, For AFLA40231
[Compatible models]--- Replacement For Furnace AFLD Series with Serial Numbers BEFORE 72991127: For AFLD35111, For AFLD35121, For AFLD35131, For AFLD40111, For AFLD40121, For AFLD40131
[Compatible models]--- Replacement For Furnace DFMD Series with Serial Number BEFORE 72489156: For DFMD25111, For DFMD25121, For DFMD25131, For DFMD25141 and For DFMD25151
NOTE: When purchasing, please confirm if the model matches.
Feature
Easy installation, plug and play, even beginners can easily master.
Touch switch, very sensitive, quick ignition, easy to solve the problem of furnace stalling
Small and exquisite, with high quality, it can be used for a long time.
Suit For AFM, AFLD, AFLA and DFMD Series.