Bosch Refrigerator Error Codes

Complete Bosch Refrigerator Guide

This guide explains all Bosch Refrigerator error codes (CH series) with simple troubleshooting steps to help you identify and fix common issues safely before calling a technician.

E1
Defrost Sensor Fault
  • Disconnect power and restart the refrigerator.
  • Inspect the defrost sensor wiring for damage.
  • Check sensor resistance with a multimeter.
  • Replace the defrost sensor if defective.
E4
Temperature Sensor Failure
  • Reset the refrigerator.
  • Inspect temperature sensor connections.
  • Check for damaged wiring or loose plugs.
  • Replace the faulty temperature sensor.
E1 (Fridge)
Fridge Temperature Sensor Fault
  • Verify fridge temperature settings.
  • Inspect the refrigerator compartment sensor.
  • Check wiring harness connections.
  • Replace the sensor if readings are incorrect.
E2
Freezer Fan Error
  • Check for ice blocking the fan blades.
  • Inspect fan motor wiring.
  • Test the freezer fan motor.
  • Replace the fan motor if necessary.
E7
Fan Motor Issue
  • Inspect the fan for obstructions.
  • Check motor voltage supply.
  • Verify wiring connections.
  • Replace the defective fan motor.
E3
Compressor Issue
  • Listen for compressor operation.
  • Check start relay and overload protector.
  • Inspect power supply voltage.
  • Contact a technician if compressor failure is suspected.
E5
Communication Error
  • Power cycle the refrigerator.
  • Inspect wiring between control boards.
  • Check connectors for corrosion.
  • Replace the faulty control board if needed.
E6
Ice Maker Fault
  • Inspect the ice maker assembly.
  • Verify water supply to the unit.
  • Check ice maker sensor operation.
  • Replace defective ice maker components.
ALARM
Door Left Open Warning
  • Ensure all doors are fully closed.
  • Inspect door gaskets for damage.
  • Check door switch functionality.
  • Remove items blocking the door.
E8
Defrost System Failure
  • Inspect the defrost heater.
  • Check defrost thermostat operation.
  • Verify control board output.
  • Replace failed defrost components.
E9
Low Temperature Sensor Error
  • Check sensor placement.
  • Inspect wiring harness connections.
  • Test sensor resistance values.
  • Replace the sensor if faulty.
E10
Evaporator Sensor Fault
  • Inspect evaporator sensor wiring.
  • Check for ice buildup around the sensor.
  • Measure sensor resistance.
  • Replace the evaporator sensor if needed.
E11
Ambient Sensor Error
  • Inspect ambient temperature sensor.
  • Check wiring connections.
  • Test sensor values against specifications.
  • Replace the faulty sensor.
E12
Ice Maker Sensor Fault
  • Inspect sensor wiring.
  • Check ice maker operation.
  • Verify sensor resistance values.
  • Replace the sensor if defective.
E13
Damper Control Error
  • Inspect damper door movement.
  • Check motor and wiring.
  • Remove any obstructions.
  • Replace the damper assembly if needed.
E14
Defrost Heater Fault
  • Disconnect power before inspection.
  • Test heater continuity.
  • Inspect heater wiring.
  • Replace the defective heater element.
E15
Defrost Thermostat Error
  • Inspect thermostat connections.
  • Test thermostat continuity.
  • Check for frost accumulation.
  • Replace the thermostat if faulty.
E16
Control Board Communication Fault
  • Power cycle the appliance.
  • Inspect communication wiring.
  • Check board connectors.
  • Replace damaged control boards if necessary.
E17
Condenser Fan Error
  • Inspect condenser fan blades.
  • Check for dust buildup.
  • Verify motor voltage supply.
  • Replace the condenser fan motor if required.
E18
High Temperature Warning
  • Ensure doors are fully closed.
  • Check for blocked air vents.
  • Verify cooling system operation.
  • Allow the refrigerator time to return to normal temperature.
88 88
Power Interruption
  • Confirm power has been restored.
  • Press any control panel button to clear the display.
  • Check refrigerator operation.
  • Monitor for recurring power issues.

Frequently Asked Questions


Why is my Bosch refrigerator not cooling properly?
Check temperature settings. Ensure vents are not blocked by food items. Clean condenser coils if accessible. Verify doors are sealing properly.
Why is my Bosch refrigerator making unusual noises?
Normal sounds may include fans and compressor operation. Check for items vibrating inside the refrigerator. Ensure the unit is level. Inspect fan motors if noise becomes excessive.
Why is my Bosch refrigerator leaking water?
Check the defrost drain for blockage. Inspect water supply lines for leaks. Ensure the drain pan is properly positioned. Verify ice maker connections are secure.
Why is frost building up inside my Bosch refrigerator?
Check if the door is closing completely. Inspect door gaskets for damage. Avoid leaving doors open for extended periods. Verify the defrost system is functioning correctly.
Why is my Bosch freezer not freezing properly?
Check freezer temperature settings. Ensure airflow vents are not blocked. Inspect the evaporator fan for proper operation. Avoid overloading the freezer compartment.
Why does my Bosch refrigerator keep beeping?
The door may be left open. Check for high-temperature warnings. Verify doors are fully closed and sealed. Reset the alarm if necessary.
Why is my Bosch ice maker not working?
Ensure the water supply is connected. Check for frozen water lines. Verify ice maker is turned on. Inspect the ice maker sensor and components.
Why is food freezing in the refrigerator section?
Lower the refrigerator temperature setting. Avoid placing food directly in front of air vents. Check temperature sensors. Verify damper control operation.
Why is my Bosch refrigerator running constantly?
Check for dirty condenser coils. Verify doors are sealing correctly. High room temperatures can increase run time. Inspect temperature settings and sensors.
Why does my Bosch refrigerator smell bad?
Remove spoiled food items. Clean shelves and drawers regularly. Check the drain pan and defrost drain. Use baking soda to absorb odors.
Why is the refrigerator light not working?
Check if the bulb or LED module has failed. Verify the door switch is operating correctly. Ensure power is reaching the appliance.
How do I reset my Bosch refrigerator?
Unplug the refrigerator or switch off power for 5–10 minutes. Restore power and allow the system to restart. Check if the error code or warning has cleared.
Why is my Bosch refrigerator displaying an error code?
Error codes usually indicate sensor, fan, compressor, or communication issues. Note the code displayed and follow the recommended troubleshooting steps for that specific fault.
Why does my Bosch refrigerator have condensation inside?
Check door seals for leaks. Avoid frequently opening the doors. Ensure food containers are covered. Verify humidity settings if available.
What should I do if Bosch refrigerator error codes keep appearing?
Reset the refrigerator and inspect fans, sensors, and door seals. Ensure proper airflow and temperature settings. Contact a qualified technician if errors continue.
Important: Always disconnect power before performing repairs. Contact a qualified technician if the issue persists.