Answer
Nov 03, 2025 - 05:49 AM
Yes - the Atwood/Dometic 31501 (DC DSI ignition control board) is a valid replacement for the AFLD40121 Hydro Flame furnace, which is a 40,000 BTU DC DSI model.
Will this fit the AFLD40121 NBK 11455 Atwood 31501 Furnace Ignition Control Board – 12V DC RV Furnaces Heaters
Question ID: 6425444 Status:
Open Nov 02, 2025 - 05:34 PM
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NBK 11455 Atwood 31501 Furnace Ignition Control Board – 12V DC
NBK 11455 replaces Atwood 31501 ignition board for Hydroflame DSI furnaces. 12V DC, fan control, 15-sec pre-purge, lockout protection. Fits 79/85/89 series. Adapter req'd for some older models.
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Atwood 31501 Ignition Control Circuit Board For DSI Furnaces
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