I have a Bosch side by side model# B22CS30SNS/01 that is showing a code E21 on the front display. I believe this indicates a connection problem or faulty control module. How do you verify which it is. Can't find any repair or troubleshooting info on line. Also, although I believe it is not related, the solenoid that controls the ice cube/crushed ice selection went out and it only dispenses crushed ice. This was a problem for at least a month before the water and ice stopped working.