E05
T-fal Control Board / EEPROM Communication Error

Display shows E05 and the machine will not start; sometimes appears after a power surge or outage.

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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

Corrupted firmware in control board, Loose ribbon cable between display and main PCB, Power surge damage to microcontroller, Oxidized board connectors

How to Fix / Troubleshooting

Safety first: Unplug the coffee maker before inspecting any cables or connectors. Do not open sealed electronic modules.

  • Hard reset: Unplug the unit for at least 15 minutes. Press and hold the Start or On/Off button for 10 seconds while unplugged to discharge residual power, then plug back in.
  • Check power source: Plug the coffee maker directly into a wall outlet (no power strip or extension cord). Avoid outlets shared with high-power appliances.
  • Inspect display area: If accessible without disassembly, gently press around the display bezel to ensure the internal ribbon cable has not come loose due to impact.
  • Surge protection: If E05 occurred after a storm or outage, consider using a surge-protected outlet for future use.

If E05 persists, the main control board or its firmware is likely damaged. Replacement of the control PCB is typically required and should be performed by an authorized service center.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board
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