The Furrion Main PCBA Control Board C-FF40SC15A-006 is the OEM replacement part intended for Furrion RV appliances, including the FF40SC15A-BL electric fireplace. However, because your original circuit board (part number 1336FUR-3S-8) has notable differences in soldered layout and connectors—such as a red 2-pin connector for LED lights and a red 4-pin connector for heater/blower—not present on the replacement board, compatibility is not guaranteed. It is essential to verify that the replacement board matches your exact model number and connector requirements before purchase. If compatibility cannot be confirmed or if your board has unique features, contacting the manufacturer directly for the correct part is recommended. For further assistance, please provide detailed photos and specifications of your current board to ensure you receive the correct replacement.