Staff Answer
Sep 28, 2026 - 07:41 AM
With power to the board and a good fuse, the next thing to test is the AC heater. Unplug it and measure its resistance. An open (infinite) reading means it's burned out. If the heater is good, check whether the board sends 120V to it when it's set to AC. If it doesn't, the board is the cause. For an N611V with a serial above 9056491, that's the 628661 power board.
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