E6
Sharp Communication Error Between Display PCB and Main Control PCB

Dehumidifier displays E6 and will not operate normally.

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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 or damaged communication harness between display board and main PCB, oxidized connectors, failed display PCB, failed main control PCB

How to Fix / Troubleshooting

Safety: Unplug the unit before accessing any internal boards.

Steps:

  • Check for moisture: Inspect the control panel area for signs of water ingress or condensation, which can cause communication faults.
  • Access control boards: Remove the top/control panel cover to expose the display PCB, then remove the rear or side panel to access the main control PCB.
  • Inspect harness: Locate the multi-wire harness connecting the display PCB to the main PCB. Check for pinched, cut, or abraded wires.
  • Reseat connectors: Disconnect the harness at both ends, inspect pins for corrosion or bending, then reconnect firmly.
  • Visual inspection: Look for burn marks or cracked solder joints on both PCBs, especially near the connector area.
  • Board substitution: If available, swapping in a known-good display PCB or main control PCB can isolate the faulty board.

When to seek service: If reseating the harness does not clear E6, one of the boards is likely defective. Board-level repair is not recommended for DIY; replace the entire PCB assembly or contact a Sharp-authorized service center.

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Repair Difficulty

Hard 4/5

Required Part

Display PCB or Main Control PCB
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