Your Bosch dishwasher control panel will indicate an error has occurred. The error code will alert you as to what part of the dishwasher needs attention so you can fix and clear the error.
Bosch dishwasher error codes are alphanumeric codes that indicate specific issues with the appliance. Each code corresponds to a particular problem, helping users and technicians diagnose and fix the issue.
Bosch dishwasher error codes
Below we will cover the most typical error codes; however, it is best to consult the manual of your specific Bosch dishwasher model to understand what the error code signifies. Manuals for Bosch dishwashers are available on Bosch.
Error code E0
The error code indicates: Diagnostic Test Mode
To fix the error: When your dishwasher displays the E0 error code, it means it is currently in diagnostic test mode. There are no issues or errors to investigate; simply turn the power off and on to exit diagnostic test mode. If you suspect the control board may be damaged, it is advisable to have a technician confirm the control board’s condition before replacing it. Bosch dishwasher beeping?
Bosch dishwasher control panel
Error code E01
The error code indicates: Pump Circuit Failure or Heating Issue
To fix the error: An E01 error code may indicate a pump control circuit failure on the main control board. This issue can cause the dishwasher to lack water, preventing the heater from running and triggering the error code. To resolve this issue, it is essential to have the main control board inspected and repaired by a qualified technician.
Bosch dishwasher error code E01
Error code E02
The error code indicates: Heater Relay Fault or Heating Issue
To fix the error: The E02 error code represents a heater relay fault on the control board. In some instances, it may be caused by a faulty temperature sensor or thermistor. To fix this error, consider replacing the affected parts.
Bosch dishwasher heater element
Error code E03
The error code indicates: Auxiliary Heater Relay Fault or Water Inlet Valve Failure
To fix the error: E03 errors often stem from auxiliary heater relay faults on the main control board. Occasionally, they indicate the need for a water inlet valve replacement. To resolve this issue, consider replacing the water inlet valve.
Bosch water valve assembly for dishwasher
Error code E04
The error code indicates: Heating Fault or Water Issue
To fix the error: An E04 error code typically refers to a heating issue that requires diagnosis by a trained Bosch technician. In some cases, the problem may involve a clogged spray arm or a water flow sensor replacement. Dishwasher not spraying water?
Error code E05
The error code indicates: Water Switch Triac Fault or Float Issue
To fix the error: E05 errors usually occur due to a water switch Triac fault on the main control board. In some instances, this error may indicate a damaged float or defective float switch. Replacing these parts may resolve the error.
Error code E06
The error code indicates: Door Mechanism Failure or Aqua Sensor Fault
To fix the error: An E06 error may signify that the dishwasher door isn’t closing correctly, or there may be an issue with the aqua sensor. If the door is closing and locking properly, the sensor switch monitoring the door may need replacement, or the main control board may have a fault that a Bosch technician should diagnose and fix.
Error code E07
The error code indicates: Drying Fault
To fix the error: A drying fault may be caused by the drying fan or wiring from the control board to the drying fan. Inspecting and potentially replacing these parts could resolve the issue.
Error code E08
The error code indicates: Loss of Water
To fix the error: Loss of water during the cycle may result from overturned dishes collecting water or a water supply issue. Make sure to properly load the dishwasher and ensure the water supply is functioning correctly.
Error code E09
The error code indicates: Heating Fault
To fix the error: A heating fault may be due to a heater relay fault on the main control board, or the heater itself may be defective. A trained technician should evaluate the control board and heater for necessary repairs or replacements.
Bosch dishwasher heater assembly
Error code E10 & E12
The error code indicates: Slow Heating
To fix the error: Slow heating may be caused by excessive limescale or a defective heater. Deep cleaning and descaling the dishwasher may resolve the issue, or the heater may need replacement.
Error code E11
The error code indicates: Thermistor or Temperature Sensor Fault
To fix the error: To diagnose a thermistor or temperature sensor fault, check the resistance of the thermistor or the NTC (temperature sensor) with a multimeter.
Bosch dishwasher temperature sensor (Thermistor)
Error code E13
The error code indicates: Excessive Water Temperature
To fix the error: To address the E13 error code, first ensure that your Bosch dishwasher is connected to a cold water supply. Next, examine the temperature sensor for any potential faults. You may use a multimeter to measure its resistance and verify its proper functioning.
Error code E14
The error code indicates: Water Inlet Issue
To fix the error: An E14 error code could signify an issue with the flow meter, which is situated on the heat exchanger. To resolve this problem, consider replacing the flow meter to ensure accurate water inlet measurements.
Bosch dishwasher regulator water level
Error code E15
The error code indicates: Potential Dishwasher Leakage
To fix the error: To tackle the E15 error code, inspect your dishwasher for any visible leaks. If no leaks are detected, examine the flood sensor located in the drain pan beneath the tub, as it could be malfunctioning. Additionally, check hoses, gaskets, and spray arms for damage, as they may require replacement to prevent further leakage. Bosch dishwasher e15 error?
Bosch dishwasher error code E15
Error code E16
The error code indicates: Water Inlet Malfunction
To fix the error: The E16 error code indicates that the dishwasher is filling with water when it shouldn’t be. In this case, consider replacing the water inlet valve to resolve the issue and ensure proper water flow within the dishwasher. Dishwasher is overflowing?
Error code E17 & E18
The error code indicates: Not Enough Water
To fix the error: If the dishwasher isn’t filling with water, ensure the water supply line is turned on and not kinked. If the issue persists, consider replacing the water inlet valve.
Error code E19, E20, E21
The error code indicates: Heating complications
To fix the error: Examine the heat pump (E20, E21) and heat exchanger (E19) for any malfunctions or damage. Ensure that all connections are secure and that there are no visible signs of wear or breakage. If necessary, consider replacing the faulty components.
Error code E22
The error code indicates: Obstructed filter
To fix the error: Carefully remove and thoroughly clean the dishwasher’s filter, ensuring that any debris or buildup is eliminated. After completing the cleaning, reinstall the filter and test the dishwasher to confirm that the issue has been resolved. How to clean dishwasher filter
Bosch dishwasher filter removal
Error code E23, E24, E25
The error code indicates: Drain pump malfunction or obstructed drain hose
To fix the error: First, inspect the drain pump for any signs of mechanical failure, such as damage or wear. If the pump appears to be in good condition, use a multimeter to perform a continuity test to check for any electrical issues. If the drain pump is functioning correctly, examine the drain hose for any clogs or blockages. In some cases, you might need to detach the hose and clear any obstructions using a flexible cleaning brush or a high-pressure water jet. Once the issue has been addressed, reassemble the dishwasher and run a test cycle to ensure proper operation. Bosch dishwasher drain issues?
Bosch dishwasher error code E25
Error code E26
The error code indicates: Diverter motor fault
To fix the error: First disconnect the dishwasher from the power source and then inspect the diverter valve for any debris or blockage. If necessary, clean or replace the valve to ensure proper function.
Error code E27
The error code indicates: Under voltage error
To fix the error: This error may be caused by an insufficient power supply. To fix this, verify the power voltage using a multimeter and ensure it falls within the acceptable range for your dishwasher model. If the issue persists, consult an electrician to assess the electrical supply.
Error code E28
The error code indicates: Aqua sensor fault
To fix the error: Although related to Error code E06, the E28 error code specifically indicates an issue with the aqua sensor. To address this, carefully clean the sensor with a soft brush, removing any debris or build-up. If cleaning does not resolve the issue, consider replacing the aqua sensor.
Error code E29
The error code indicates: Low mains voltage error
To fix the error: Similar to the E27 error, this issue is related to an inadequate power supply. Double-check the power voltage with a multimeter and consult an electrician if necessary to ensure the voltage is appropriate for your dishwasher model.
Error code E30
The error code indicates: Voltage is too high
To fix the error: To fix this issue, first unplug the dishwasher and use a multimeter to confirm the voltage is less than 240 volts. If the voltage exceeds this limit, consult an electrician to rectify the electrical supply issue.
Bosch Error Code Categories
For quick reference, here are the Bosch dishwasher error code types:
- E01 error indicates a heating issue
- E02 error indicates a water inlet problem
- E03 error indicates a water drainage issue
- E04 error indicates a water filling issue
- E09 error indicates a heating element malfunction
- E24 error indicates a drainage error
Bosch dishwasher customer service test mode
Bosch dishwasher error code displays how to clear
How to Troubleshoot Bosch Dishwasher Error Codes
- Read the Error Code First, identify the error code displayed on your dishwasher’s control panel. This will help you pinpoint the issue and find the appropriate troubleshooting steps.
- Consult the User Manual Your Bosch dishwasher’s user manual will provide detailed information on what each error code means and how to resolve the issue. If you don’t have your manual handy, you can usually find it online by searching for your dishwasher model number.
- Inspect and Clean Components Many dishwasher issues can be resolved by simply cleaning components such as the filter, spray arms, and drain hose. Regular maintenance can help prevent these issues from occurring in the first place.
- Check for Loose Connections Sometimes, dishwasher issues can be caused by loose connections or wiring issues. Inspect the connections within your dishwasher and make sure everything is securely connected.
- Reset the Dishwasher If the error code persists after attempting to troubleshoot, try resetting your dishwasher by turning it off at the power source, waiting a few minutes, and turning it back on. This can sometimes resolve minor issues.
Which Bosch Dishwashers Model Numbers Can Display Errors?
Bosch dishwashers come in various models, and most of them can display error codes when a problem occurs. While the specific model numbers may vary, Bosch dishwasher model numbers that can show error codes include:
Bosch dishwasher series that can show error codes include:
- Ascenta Series
- 300 Series
- 500 Series
- 800 Series
- Benchmark Series
Please note that the error codes may be similar across different models, but some codes might be specific to certain models. Always consult your dishwasher’s user manual or the manufacturer’s website for the most accurate and up-to-date information on error codes and troubleshooting for your specific model.
Bosch Error Questions
How do I clear the error code on my Bosch dishwasher? To clear the error code on your Bosch dishwasher, first, try resetting the appliance by turning off the power at the circuit breaker for a minute, then turning it back on. If the error code persists, it’s likely an indication of an unresolved issue that requires further troubleshooting or professional assistance.
Why are the lights flashing and not starting my Bosch dishwasher? Flashing lights on a Bosch dishwasher can indicate several issues, such as a door not properly closed, a water supply problem, or an error code. Ensure the door is securely closed, check the water supply, and look for any displayed error codes. If the issue persists, consider contacting a professional for assistance.
What is the most common problem with a Bosch dishwasher? One of the most common problems with Bosch dishwashers is a drainage issue, often indicated by error codes such as E03 or E24. This can be caused by a clogged filter, a blocked drain hose, or a malfunctioning drain pump. Regular maintenance and cleaning can help prevent these issues.
If you need more assistance with your Bosch dishwasher after going through this list of error codes and what to do, please leave a comment below and an appliance expert will get back to you asap.