Bosch Dishwasher Error Codes: Troubleshooting & Fixes

Bosch dishwashers are reliable, but they can show error codes when problems happen. Understanding these Bosch dishwasher error codes helps users quickly diagnose and fix problems.

What Are Bosch Dishwasher Error Codes?

Bosch dishwashers use error codes to say specific malfunctions. These codes show up on the display panel. They help users fix problems like water supply issues, drainage failures, and heating element malfunctions.

Error Code E01 – Faulty Heat Pump

Issue: The heat pumps motor has a malfunction.
Solution:

• Reset the dishwasher by unplugging it for 30 seconds.
• If the issue persists, contact Bosch customer support.

Error Code E02 – Main Control Board Issue

Issue: A relay fault in the main control board.
Solution:

• Turn off the dishwasher at the breaker for one minute.
• If the problem continues, a technician should inspect the board.

Error Code E03 – Control Board Relay Failure

Issue: A failure in the main control board relay.
Solution:

• Perform a hard reset.
• Replace the control board if needed.

Error Code E04 – Heater Electronics Failure

Issue: The heater circuit has failed.
Solution:

• Reset the dishwasher.
• If unresolved, replace the heating element.

Error Code E05 – Wash Arm Diverter Fault

Issue: The wash arm diverter circuit is malfunctioning.
Solution:

• Inspect for blockages.
• Replace the diverter motor if necessary.

Error Code E06 – Door Sensor Malfunction

Issue: The door sensor circuit has failed.
Solution:

• Ensure the door is fully closed.
• Inspect and replace the sensor if required.

Error Code E07 – Zeolite Fan Motor Defect

Issue: The Zeolite drying fan has failed.
Solution:

• Perform a system reset.
• If the fan does not work, replace the drying system.

Error Code E09 – Heat Pump Heater Failure

Issue: The internal heater is malfunctioning.
Solution:

• Check for loose connections.
• If unresolved, replace the heat pump.

Error Code E10 – Zeolite Chamber Heater Issue

Issue: A failure in the Zeolite drying chamber heater.
Solution:

• Reset the unit.
• If the error persists, replace the chamber heater.

Error Code E12 – Limescale Buildup

Issue: Limescale buildup is affecting the heat pump.
Solution:

• Use a Bosch-approved descaler.
• Prevent buildup by using softening salt.

Error Code E14 – Flow Meter Failure

Issue: The water flow meter is faulty.
Solution:

• Check the inlet hose for blockages.
• If unresolved, replace the flow meter.

Error Code E15 – Water Leak Detected

Issue: The leakage protection system is activated.
Solution:

• Turn off the water supply.
• Inspect for leaks at the bottom.

Error Code E16 & E17 – Water Filling Issues

Issue: The dishwasher isn’t filling properly.
Solution:

• Check for kinks in the inlet hose.
• Clean the water inlet filter.

Error Code E18 – Water Flow Restriction

Issue: Water is not flowing properly.
Solution:

• Clean the filter and check for hose obstructions.
• Reset the dishwasher.

Error Code E19 – Faulty Heat Exchanger

Issue: The heat exchanger is defective.
Solution:

• Replace the heat exchanger unit.

Error Code E20 – Circulation Pump Failure

Issue: The circulation pump is malfunctioning.
Solution:

• Check for clogged pipes.
• Replace the pump motor if needed.

Error Code E21 – Blocked Drain Pump

Issue: The drain pump is obstructed.
Solution:

• Clean the drain pump filter.
• Inspect for clogs in the drain line.

Error Code E22 – Clogged Filter

Issue: The filter is clogged with debris.
Solution:

• Clean the dishwasher filter regularly.

Error Code E23 – Drain Pump Circuit Fault

Issue: The drain pump’s electrical circuit has failed.
Solution:

• Check for loose connections.
• Replace the drain pump module.

Error Code E24 – Drainage Issue

Issue: The dishwasher is unable to drain water.
Solution:

• Clean the drain hose and filter.
• Check for pipe blockages.

Error Code E25 – Drain Pump Blockage

Issue: The drain pump is blocked.
Solution:

• Remove debris from the drain pump cover.
• Inspect for foreign objects.

Error Code E27 – Low Voltage Supply

Issue: The voltage supply is too low.
Solution:

• Ensure stable power supply.
• If unresolved, contact an electrician.

Final Thoughts on Bosch Dishwasher Error Codes

Understanding Bosch dishwasher error codes can help prevent costly repairs and maintain efficiency. If an error persists, always consult the Bosch user manual or a certified technician.

For more troubleshooting tips, visit Bosch Home Support (bosch-home.com).