Microwave shows E15 and may not start; sometimes accompanied by beeping and frozen display.

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.

Possible Causes

Corrupted control board firmware, Failed EEPROM memory chip, Power surge during operation, Incorrect configuration data

How to Fix / Troubleshooting

Safety: Unplug the microwave.

Extended reset: Leave the unit unplugged for at least 30 minutes to allow full discharge and memory reset. Then reconnect and set the clock.
Factory reset (if available): Consult your Bosch user manual for any key combination that performs a factory reset of settings. Apply it and test basic functions.

If E15 returns: The control board firmware or EEPROM is likely damaged. This is not user-repairable; the control board must be reprogrammed or replaced by Bosch service.

Repair Difficulty

Hard 4/5

Required Part

Main Control Board (EEPROM)

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