E7
Tefal
Main Control Board Communication / EEPROM Error
E7 appears on the display and the unit will not start; sometimes occurs after a power surge or lightning storm.
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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 PCB, Damaged microcontroller from surge, Loose display-to-main-board ribbon cable, Faulty keypad interface
How to Fix / Troubleshooting
Safety first: Unplug the air fryer before opening the housing.
- Power cycle: Disconnect from mains for at least 10 minutes to allow capacitors to discharge, then reconnect and test. This can clear minor logic faults.
- Check keypad and display: Ensure the control panel is not wet or contaminated with oil. Wipe gently with a slightly damp cloth and dry thoroughly.
- Internal cable check (advanced):
- Remove the control panel cover.
- Inspect the ribbon cable between the display/keyboard PCB and the main control board.
- Reseat the connector carefully, ensuring it is fully inserted and not corroded.
- Surge damage: If E7 persists and the unit was exposed to a power surge, the main PCB is likely damaged and must be replaced. This is typically not repairable at component level for home users.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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