Staff Answer
Sep 28, 2026 - 06:28 AM
If the fuse keeps blowing, something on the 12V side is shorted. Unplug the 12V loads one at a time (igniter, gas valve, interior light, fans) and put in a new fuse each time. If it holds after you unplug one, that part or its wiring is the problem. If it blows with everything unplugged, the board is bad. For N611 serials below 9056491, that's the 621991001 power board kit, and above that, the 628661 power board.
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