Bosch Error Code E21

Fault: Communication error between display control module and the ice and water dispenser control module.

Applies to: Bosch Side by Side Refrigerator

Bosch Refrigerator displaying an error code? Bosch Refrigerators have built in diagnostic systems. If your Refrigerator finds, sees, or detects a fault or error in the system, it will show an error or fault code. The error code will display where the usual numbers are on the display screen. When an error code is displayed, your Refrigerator is telling you a specific fault.