What does it mean when 'E' or 'd' appears on the temperature display?
When 'E' or 'd' appears on the temperature display, the electronics have detected a fault. To resolve this, switch off the appliance, unplug it or switch off the circuit breaker, reconnect after 5 minutes, and switch it back on. If the message still appears, call Customer Service.
From the official Bosch B36CT Freezer Refrigerator manual, page 28
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