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Changed a control board on a LG fridge, then spent 3 hours chasing a ghost error
Swapped out a dead main board on a 2018 LG French door, got everything running, then the ice maker refused to cycle. Checked voltages, harnesses, and the door switch for two and a half hours before noticing a tiny piece of styrofoam blocking the ice maker's shutoff arm. Anybody else spent way too long on a stupid simple fix like that?
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brookethomas20d ago
The styrofoam piece makes sense as a culprit, but here's the thing - that shutoff arm is supposed to be blocked by the ice itself when the bin is full. So the real problem might have been that the board swap didn't reset the ice maker's position sensor properly. A lot of LG fridges need a specific power cycle sequence after a board replacement, not just plugging it back in. Next time, try pulling the ice maker connector for 30 seconds after the board swap, then plug it back in. The styrofoam was the symptom, not the root cause.
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kai60220d ago
Three years I had an LG fridge with the exact same model and that sensor trick never worked for me once. I tried the connector pull thing, the 30 second wait, even holding the arm down manually while plugging it back in. Nothing changed until I physically removed that piece of Styrofoam that was sitting on top of the ice bin. The whole problem is that LG's ice maker mechanism is cheap plastic and the shutoff arm gets stuck on anything that's not perfectly flat. The sensor resets fine during a board swap, the real issue is that the arm can't drop all the way down because it hits that foam and thinks the bin is empty. When I took the foam out and left the board alone, it worked perfectly for another year and a half. So no, I think the foam was the root cause in this case, not some hidden sensor issue. LG just builds these things with way too little clearance around the arm.
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