Product Overview: This sail switch is designed for use with the for 31094 series of for RV furnace gas flow systems, including for AFM, for AFLD, for AFLA, and for DFMD models. Furnace for DFMD series, serial number BEFORE for 72489156: for DFMD25111, for DFMD25121, for DFMD5131, for DFMD21541 and for DFMD21551.
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