E20
Tower
Configuration / EEPROM Error
Oven shows E20 and no functions can be selected; display may show only the error.
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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 settings, Failed memory chip on control PCB, Power surge during operation, Incorrect replacement control board not programmed for this Tower model
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before any disassembly.
Steps to check:
- Power cycle: Disconnect power for 10–15 minutes to allow the control to fully discharge, then restore power.
- Factory reset: Some Tower models support a service reset sequence (consult service documentation). Perform the reset if available.
- Board verification: If the control board was recently replaced, verify that the correct Tower part number was installed for your exact model.
Important: If E20 persists, the main control PCB will likely need replacement and configuration by an authorized service center.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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