E19 error; internal memory or configuration fault affecting ice maker operation.

Safety: Disconnect power before handling the control board.

• Power reset: Turn off the appliance at the breaker or unplug for at least 10 minutes, then restore power to see if the error clears.
• Check for recent repairs: If a control board was recently replaced, verify that the correct Bosch part number was installed and that any configuration steps in the service manual were completed.
• Firmware update (if available): Some Bosch models allow firmware updates via service tools. This must be performed by an authorized technician.
• Replace control board: If E19 persists, replace the main control board with the correct Bosch OEM part. Label all connectors, swap boards, and reassemble.