E9
Whynter
Internal Communication / Control Board Error
E9 error code, unit may shut down shortly after starting
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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 wiring harness between display and main PCB, Corrupted control board firmware, Failed main control PCB, Moisture intrusion on control electronics
How to Fix / Troubleshooting
Safety: Unplug the ice maker before removing the control panel or accessing the electronics.
Steps to troubleshoot E9:
- Power cycle: Unplug the unit for at least 10 minutes to allow capacitors to discharge, then plug back in. If E9 returns, continue.
- Inspect control panel: Remove the front control panel or top cover to access the display board and main control PCB.
- Check harness connections: Reseat all multi-pin connectors between the display board, sensor harnesses, and main control board. Ensure they are fully seated and locked.
- Look for moisture or corrosion: If there are signs of water ingress (condensation, rust, or white residue), dry the area thoroughly and clean corrosion with contact cleaner.
- Visual board inspection: Examine the main PCB for burnt components, cracked solder joints, or bulging capacitors. Any visible damage usually requires board replacement.
- Replace control board: If wiring is intact and E9 persists, replace the main control PCB (and display board if sold as a kit) with the correct Whynter part number.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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