Replacement for Suburban part numbers 525003, 232261 and 233382
525003 OEM RV Furnace Air Flow Sail Switch
This is a replacement sail switch for select Suburban 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.
Suburban Furnaces with Serial Numbers ABOVE 924201894: SF-20, SF-20F, SF-20FQ, SF-20Q, SF-25, SF-25F, SF-25FQ, SF-25Q, SF-30, SF-30F, SF-30FQ, F-30Q, SF-35, SF-35F, SF-35FQ, SF-35Q, SF-42, SF-42F, SF-42FQ, SF-42Q, SFV-20, SFV-20Q, SFV-20FQ, SFV-25, SFV-25Q, SFV-25FQ, SFV-30, SFV-30Q, SFV-30FQ, SFV-35, SFV-35Q, SFV-35FQ, SFV-42, SFV-42Q, SFV-42FQ, SH-42, SH-42F