E12
Chaffoteaux
EEPROM / Configuration Data Error
E12 shown on display, often after power disturbances; unit may not respond to controls.
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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 PCB memory, Incorrect PCB replacement without programming, Voltage surge damage
How to Fix / Troubleshooting
Safety: Disconnect power before handling the PCB.
- Power reset: Turn off the appliance at the isolator for at least 2 minutes, then restore power and see if the error clears.
- Check earth and supply: Ensure the appliance has a solid earth connection and that supply voltage is stable. Consider fitting a surge protector if supply is unstable.
- PCB configuration: If the PCB was recently replaced, it may require configuration with Chaffoteaux service tools or parameter setting according to the installation manual.
- Replace PCB: If E12 persists, the PCB memory is likely damaged and the board must be replaced and configured by an authorized technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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