E18
Iceman Communication Bus or Control Board Link Fault

E18 error, communication failure between display board and main control board

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose communication harness, Damaged data cable, Failed display PCB, Failed main PCB communication circuit

How to Fix / Troubleshooting

Safety: Unplug the ice maker before accessing control boards.

  • 1. Reseat connectors: Remove the control panel and access the display PCB and main PCB. Unplug and firmly reconnect the communication harness at both ends.
  • 2. Inspect cable: Look for pinched, cut, or abraded sections of the data cable. Replace if any damage is found.
  • 3. Check for corrosion: Examine board connectors for corrosion or bent pins. Clean gently with contact cleaner and straighten pins if needed.
  • 4. Board substitution: If available, substitute a known-good display board or main PCB to isolate which board is faulty. Replace the defective board.
  • 5. Reset: After repairs, unplug the unit for several minutes to clear the error, then power up and verify normal communication.
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Repair Difficulty

Hard 4/5

Required Part

Display PCB / Main PCB Harness
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