Bosch Refrigerator Error Codes

Complete Troubleshooting & Repair Guide

Temperature Sensor Errors
E1
Defrost Sensor Fault
  • Check defrost sensor connection.
  • Inspect wiring for damage or looseness.
  • Test sensor resistance.
  • Replace sensor if readings are abnormal.
E4
Temperature Sensor Failure
  • Inspect fridge temperature sensor.
  • Check wiring harness.
  • Clean sensor area.
  • Replace sensor if faulty.
E1 (Fridge Section)
Fridge Temperature Sensor Fault
  • Check refrigerator compartment sensor.
  • Inspect connector pins.
  • Verify airflow inside fridge.
  • Replace sensor if needed.
Fan & Airflow Errors
E2
Freezer Fan Error
  • Check freezer fan motor.
  • Remove ice blockage around fan.
  • Inspect wiring connections.
  • Replace fan motor if faulty.
E7
Fan Motor Issue
  • Inspect evaporator fan motor.
  • Check for dust or ice buildup.
  • Test motor operation.
  • Replace motor if needed.
Compressor Errors
E3
Compressor Issue
  • Check compressor relay.
  • Inspect wiring connections.
  • Ensure stable power supply.
  • Call technician if compressor is locked.
Communication Errors
E5
Communication Error
  • Reset refrigerator power.
  • Check control board connections.
  • Inspect wiring harness.
  • Replace PCB if needed.
Ice Maker Errors
E6
Ice Maker Fault
  • Check water supply line.
  • Inspect ice maker module.
  • Clear ice blockage.
  • Reset ice maker system.
Door & System Alerts
ALARM
Door Left Open / Temperature Warning
  • Ensure door is fully closed.
  • Check door gasket seal.
  • Reduce frequent door opening.
  • Allow unit to stabilize temperature.
Important: Always unplug the refrigerator before performing any repairs. If the issue continues after troubleshooting, contact a qualified technician.