NON-FUNCTIONAL, PARTS ONLY-------------------------------Upgrade 520741 RV Furnace Control Circuit Board with fan Control Compatible with Suburban Furnace SA/SF/SFV/SH/NT series Replace 520820 521099 520871 for SF 20/25/30/35/42, NT 12/16/20/24/30/34

Additional Details from the Manufacturer

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• ✅【5.2*4.2*2 inch】works with the following manufacturer's part numbers:520741 Kit with (included in 31501 Kit) & 6 pin header connector，520820 Kit with 232613，521099，FAN 50 PLUS PINS
• ✅[ Fan Control]The RV Furnace Ignition Control Board is designed to replace the new Suburban and Atwood / HydroFlame Fan Control boards as well as maintain backward compatibility with the Fan 50 Plus, and UIB Fan Control boards which have been available since 1994. This board can also be used to upgrade older furnaces to add the Fan Control feature.
• ✅[Compatibility]Compatible with Suburban SF-20, SF-20F, SF-20FQ, SF-20Q, SF-25, SF-25F, SF-25FQ, SF-25Q, SF-30, SF-30F, SF-30FQ, SF-30Q, SF-35, SF-35F, SF-35FQ, SF-35Q, SF-42, SF-42F, SF-42FQ, SF-42Q, SFV-20, SFV-25, SFV-30, SFV-35, SFV-35Q, SFV-42, SH-35, SH-35F, SH-42, SH-42F, SHD2542，NT-12EF, NT-12F, NT-12FC, NT-12L, NT-12LE, NT-12MEF, NT-12S, NT-12SE, NT-16EF, NT-16F, NT-16FC, NT-16L, NT-16LE, NT-16MEF, NT-16S, NT-16SE, NT-16SEQ, NT-16SQ, NT-20L, NT-20LE, NT-20S, NT-20SE, NT-20SEQ, NT-20SQ, NT-20T, NT-24M, NT-24S, NT-24SP, NT-25K, NT-30K, NT-30M, NT-30S, NT-30SP, NT-34S, NT-34SP, NT-35K, NT-40, NT-42S, NT-42T
• *Note: if there is a difference in size between your original circuit board and this circuit board, please make sure to check if the size of this model is compatible with your furnace, or consult a professional repairman to avoid inconvenience，The fan control feature MUST BE USED for proper operation of the board. Fan control boards should not be used in DuoTherm 900 series furnaces that have the thermostat in the ground circuit. DuoTherm furnaces can be rewired to move the thermostat from the ground side of the circuit to the positive side of the circuit so that the Fan control features of the Fan control or Fan 50 Plus Pins board can be used
• ✅[Warranty + 24/7 Support]We stand behind our product with a 2-year extended warranty and hassle-free return/exchange policy Whether you have questions about installation, fit, or quality, our 24/7 customer support team is just a message away via Amazon. Every board goes through 3 rounds of functional testing before shipping, so you can install it with confidence › See more product details