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ErrBase

Bosch Refrigerator Error Codes

All Bosch refrigerator error codes with step-by-step troubleshooting, multimeter specs, and OEM part numbers.

6 error codes

CodeMeaning
ALARM-LIGHTWhen that alarm light fires, the fridge's temperature sensors detected the internal temp climbed above the safe threshold, generally above 50°F in the fresh food section or above 15°F in the freezer. Could be a door issue, an airflow problem, or the control board logging residual heat from a power outage that already resolved.
moderatebeginner
E01E01 fires when the main power module stops getting reliable signals from the display control board or the ambient temperature sensor circuit. Basically the board is sending out a handshake and nothing's answering back. Could be a broken wire, a bad connection, or a failed board.
highintermediate
E2E2 on a Bosch refrigerator means the ice maker's temperature sensor is reading out of range, or it's got an open or short circuit. The ice maker has its own dedicated thermistor separate from the freezer sensor, and that's the one crying for help.
moderateintermediate
E3E3 means the freezer compartment temperature sensor is feeding the main control board garbage data, either an open circuit, a short, or readings that are way outside the normal operating range. The board literally doesn't know how cold your freezer is anymore.
moderateintermediate
HUBThe control board is reading a resistance value from the NTC thermistor that's outside the expected range. Either too high, too low, or completely open circuit. E2 means the ice maker sensor is out of spec. E3 means the freezer evaporator sensor. Both use the same thermistor type, just in different spots inside the machine.
moderatebeginner
NOT-COOLINGThe refrigerator is failing to maintain the set temperature in either the fresh food or freezer compartments. This indicates a breakdown in the cooling cycle, airflow, or temperature sensing logic.
highintermediate