Ed
Haier
Communication Error Between Display Board and Main Control Board
Display shows Ed and the refrigerator may not cool or may shut down intermittently.
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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 oxidized communication harness, Damaged display PCB, Damaged main PCB communication circuit, Electrical noise or surge damage
How to Fix / Troubleshooting
Safety: Unplug the refrigerator before removing any control panels or boards.
Steps:
- 1. Power reset: Disconnect power for 10–15 minutes, then reconnect. If Ed returns, proceed with hardware checks.
- 2. Access display board: Remove the front display panel (usually on the door) by releasing clips or screws. Carefully pull it forward without straining the harness.
- 3. Inspect connectors: Reseat the multi-pin connector between the display and the door harness. Look for corrosion or bent pins.
- 4. Check door hinge harness: At the top or bottom hinge, inspect the flexible harness for pinched or broken wires where the door opens and closes.
- 5. Access main PCB: Remove the rear control cover and reseat the communication harness from the door to the main board.
- 6. Replace suspect board: If wiring and connectors are intact but Ed persists, replace the display PCB first. If the error remains, the main control board may also need replacement.
Note: Handle PCBs by the edges and avoid touching components to reduce static damage.
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Repair Difficulty
Hard
4/5
Required Part
Display Control Board
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