Bosch Refrigerator Error Codes
15 error codes with causes and fixes
- E2Freezer compartment temperature sensor faultE2 on Bosch built-in and counter-depth refrigerators indicates the freezer compartment temperature sensor is faulty—the thermistor in the freezer section stopped sending valid resistance readings, so the board cannot regulate compressor and defrost cycles accurately.
- E3FlexBar or deli drawer sensor failedE3 indicates the temperature sensor in the FlexBar, deli, or chiller drawer failed—the separate zone cannot hold precise temps for cheeses and deli meats while the main fridge and freezer may continue running normally.
- E4Condenser or defrost sensor faultE4 indicates a condenser or defrost-related sensor fault on Bosch refrigeration—the sensor monitoring heat exchange or defrost termination sent readings outside calibrated limits. Warm freezer corners or long compressor run times may precede E4.
- E5Fresh food compartment sensor faultE5 means the fresh food compartment temperature sensor failed—the thermistor in the upper refrigerator section stopped reporting valid data, causing overcooling that freezes produce or warm spots that risk spoilage.
- E6Compressor running hot—condenser airflow issueE6 indicates the compressor is running hot—often because condenser coils are dust-clogged or the condenser fan is not moving enough air across the coils. Built-in installs with tight toe-kick ventilation are a frequent trigger.
- E7Evaporator fan not reporting speedE7 means the evaporator fan motor did not provide speed feedback—the fan that circulates cold air from the freezer coil to both compartments stopped or the board lost its signal. Warm fridge with cold freezer floor often appears before E7.
- E8Ice maker or ice compartment sensor faultE8 indicates an ice maker or ice compartment temperature sensor fault—the sensor that tells the board when to harvest ice or protect the ice box from warm air failed. Ice production stops while E8 is active on models with factory ice makers.
- E9Humidity or ambient sensor out of rangeE9 reports a humidity or ambient condition sensor fault on Bosch refrigerators with electronic display modules—the sensor that helps adapt defrost and fan timing to kitchen conditions sent invalid readings.
- E10Dispenser user interface faultE10 indicates a dispenser user interface fault per Bosch US refrigeration support—the through-door display or paddle electronics failed communication or self-test. Water and ice dispensing may stop while cabinet cooling continues.
- E11Water inlet valve or filter flow faultE11 indicates a water inlet fault for the ice maker or door dispenser—the valve did not fill within the expected time or filter pressure drop exceeded limits. Ice hollow cubes or slow water often precede E11.
- E12Condenser fan motor not runningE12 means the condenser fan at the compressor base is not running or not reporting speed—the motor that rejects heat from the sealed system failed. Bosch may clear E12 briefly after reset but it often returns within three hours until repaired.
- E13Freezer fan or defrost circuit faultE13 indicates a freezer fan or defrost circuit fault—the board expected airflow or defrost heat that never materialized. Heavy frost on the freezer rear panel with E13 points to defrost heater or bi-metal sensor failure rather than a simple fan stall.
- E14Main to display board communication faultE14 indicates communication failure between the main refrigeration control board and a sub-module—display, inverter compressor driver, or door UI. Temperature settings may not respond while the compressor runs on last known commands.
- E15Ambient temperature sensor at display failedE15 points to a problem with the ambient temperature sensor at the display control module—the sensor that helps the UI and main board adapt to room temperature failed. Efficiency drops in warm kitchens when E15 is active.
- E16Door open alarm exceeded time limitE16 is Bosch's extended door-open alarm—the door switch stayed open long enough that the display shows E16 and an audible alert while the compressor runs to recover temperature. Built-in models with heavy panel doors are prone if items block closure.