E9
Hotpoint
Control Panel / Keypad Communication Fault
E9 displayed, temperature setpoint cannot be adjusted correctly, display may flash
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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 ribbon cable between display and main PCB, Moisture ingress into touch panel, Failed user interface board, Faulty main control board communication circuit
How to Fix / Troubleshooting
Safety: Disconnect mains power before opening the control panel.
- Dry the control area: If condensation or liquid has contacted the display, leave the unit unplugged with the door open for several hours to dry.
- Access the control panel: Remove the screws securing the top/front trim to expose the display and keypad assembly.
- Check ribbon cable: Carefully disconnect and reconnect the flat ribbon cable between the display and main board. Ensure it is fully seated and not damaged.
- Inspect for corrosion: Look for green/white corrosion on connectors or the display PCB. Light corrosion can sometimes be cleaned with isopropyl alcohol and a soft brush.
- Test buttons: With power restored briefly, test each button or touch area. If some do not respond, the user interface board is likely faulty.
- Replace user interface board: Install a Hotpoint-compatible display/keypad module. Transfer any mounting brackets or seals from the old part.
- If E9 persists with a new UI: The main control board may have a communication fault and should be evaluated by a technician.
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Repair Difficulty
Medium
3/5
Required Part
User Interface / Display Board
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