Bosch dishwashers use error codes to indicate specific issues with the appliance. Here are the most common error codes, their meanings, and possible solutions:
1. Error Code E01
Meaning: No heating or heating issue.
Causes:
Faulty heating element.
Thermostat malfunction.
Control board issues.
Solutions:
Test and replace the heating element if it's not working.
Check the thermostat for continuity and replace it if needed.
Inspect the control board for damage or faults.
2. Error Code E02
Meaning: Problem with the temperature sensor.
Causes:
Faulty temperature sensor or probe.
Wiring issues.
Solutions:
Test the temperature sensor with a multimeter.
Replace the sensor if defective.
Inspect the wiring for damage and repair if necessary.
3. Error Code E03
Meaning: Drainage issue (water not draining).
Causes:
Clogged drain hose or filter.
Blocked air gap.
Faulty drain pump.
Solutions:
Clean the drain filter and hose.
Unblock the air gap.
Test and replace the drain pump if necessary.
4. Error Code E04
Meaning: Water overfill detected.
Causes:
Faulty float switch.
Clogged or malfunctioning drain valve.
Solutions:
Test the float switch and replace if defective.
Inspect and clean the drain valve.
Ensure the dishwasher is not overfilled with water.
5. Error Code E05
Meaning: Circulation pump problem.
Causes:
Faulty circulation pump motor.
Blocked pump impeller.
Solutions:
Remove blockages from the circulation pump.
Replace the circulation pump if the motor is defective.
6. Error Code E06
Meaning: Faulty control board or communication issue.
Causes:
Malfunctioning control board.
Communication failure between parts.
Solutions:
Reset the dishwasher to clear minor glitches.
Replace the control board if it's defective.
7. Error Code E07
Meaning: Inlet valve issue (water supply not entering properly).
Causes:
Faulty water inlet valve.
Low water pressure.
Solutions:
Inspect and replace the water inlet valve.
Ensure water pressure is sufficient.
8. Error Code E08
Meaning: Temperature sensor or heating problem.
Causes:
Heating element malfunction.
Faulty temperature sensor.
Control board issues.
Solutions:
Test and replace the heating element.
Replace the temperature sensor.
Inspect the control board for defects.
9. Error Code E09
Meaning: Drain pump failure.
Causes:
Faulty drain pump motor.
Blocked drain hose or filter.
Solutions:
Inspect and clean the drain hose and filter.
Replace the drain pump motor if defective.
10. Error Code E11
Meaning: Problem with the door latch or door switch.
Causes:
Broken or damaged door latch.
Faulty door switch.
Solutions:
Inspect and replace the door latch if broken.
Test and replace the door switch if faulty.
11. Error Code E12
Meaning: Water inlet issue.
Causes:
Blocked water inlet valve.
Low water pressure.
Solutions:
Check the water inlet valve for blockages or damage.
Ensure the water supply pressure is adequate.
12. Error Code E14
Meaning: Water supply issue.
Causes:
Water inlet valve failure.
Clogged or kinked inlet hose.
Solutions:
Replace the water inlet valve if faulty.
Inspect and straighten the water inlet hose.
13. Error Code E15
Meaning: Flood protection system activated.
Causes:
Dishwasher has detected water in the base.
Faulty float switch or water leak.
Solutions:
Check for water leaks under the dishwasher.
Inspect and clean the float switch.
Reset the dishwasher by turning off the power and draining the water.
14. Error Code E16
Meaning: Problem with the door lock or control board.
Causes:
Faulty door lock mechanism.
Control board failure.
Solutions:
Test and replace the door lock if needed.
Inspect the control board for issues and replace if defective.
15. Error Code E22
Meaning: Blocked or restricted drainage.
Causes:
Clogged drain hose or filter.
Blocked air gap.
Solutions:
Clean the drain filter and hose.
Unblock the air gap.
General Troubleshooting Tips
Reset the Dishwasher:
Unplug the dishwasher or turn off the power for 5–10 minutes, then restart it to clear minor glitches.
Inspect Hoses and Filters:
Clean the dishwasher’s drain filter and check for blockages in the hoses.
Test Electrical Components:
Test the heating element, temperature sensor, and circulation pump using a multimeter for continuity.
Check Water Supply:
Ensure the water inlet valve is functioning properly and that water pressure is sufficient.
Consult the User Manual:
Refer to the user manual for specific details on error codes and troubleshooting steps.
Call a Technician:
If the issue persists or involves complex components like the control board, consider calling a professional technician.