Bosch Dishwasher Error Codes​

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Did you see a weird code on your Bosch dishwasher? Just trying to make it go away might not really fix anything, and the code could come back. What to do? First, try to find out why this code is showing up on your dishwasher. It might be telling you something is wrong with it. If it’s hard to figure out, it’s a good idea to talk to someone who knows a lot about dishwashers. They can help you understand the problem and get your dishwasher working right again.

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Quick Solutions for Resolving Error Codes on Bosch Dishwasher

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Repairing a dishwasher often involves dealing with electrical components, a task that can be complex and hazardous, especially for those not familiar with appliance repair and electrical safety. If you are unsure about what you are doing or lack the necessary experience, it is strongly recommended to seek professional assistance. A qualified technician can provide an accurate diagnosis and ensure safe repairs, reducing the risk of injury or further damage to the appliance.

Error Code: E01

The E01 error code in a Bosch dishwasher indicates a fault in the heat pump motor circuit at the main control board. This issue typically points to a malfunction in the electrical components controlling the heat pump.

Possible Causes:

  • Faulty Heat Pump Motor: The motor itself might be defective or damaged.
  • Control Board Issues: Problems with the circuitry or components on the main control board.
  • Electrical Connection Problems: Wiring issues between the heat pump motor and the control board.
  • Overheating or Overloading: The motor or control board might be overheating due to overloading or other mechanical issues.

Fixes:

  • Inspect and Replace Heat Pump Motor: Check the motor for signs of damage or failure and replace if necessary.
  • Examine Control Board: Look for any visible issues on the control board, such as burnt components or loose connections.
  • Check Electrical Wiring: Ensure all connections between the motor and control board are secure and intact.
  • Address Overheating Issues: Investigate any potential causes of overheating and resolve them.

Error Code: E02

The “E02” error code on a Bosch dishwasher indicates a main control board relay fault or error. This error suggests a problem with one of the relays on the main control board of the dishwasher.

Possible Causes:

  • Main Control Board Relay Issue: There may be a malfunction or fault in one of the relays located on the main control board.

Fixes:

  • Power Reset: Attempt to reset the dishwasher by turning it off at the circuit breaker or unplugging it for a few minutes, and then turning it back on. This may clear temporary electrical issues.
  • Professional Assistance: If the “E02” error code persists or if you’re unsure about addressing the main control board relay issue, it’s recommended to contact Bosch’s customer support or a qualified appliance technician for proper diagnosis and repair. Always disconnect the dishwasher from the power source before attempting any repairs for safety.

Error Code: E03

The “E03” error code on a Bosch dishwasher indicates a main control board relay fault or error. This error suggests a problem with one of the relays on the main control board of the dishwasher.

Possible Causes:

  • Main Control Board Relay Issue: There may be a malfunction or fault in one of the relays located on the main control board.

Fixes:

  • Power Reset: Attempt to reset the dishwasher by turning it off at the circuit breaker or unplugging it for a few minutes, and then turning it back on. This may clear temporary electrical issues.

Error Code: E05

The “E05” error code on a Bosch dishwasher indicates a wash arm diverter circuit fault or error in the main control board. This error suggests a problem with the wash arm diverter circuitry, typically at the main control board level.

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Possible Causes:

  • Wash Arm Diverter Circuit Issue: There may be a malfunction or fault in the wash arm diverter circuitry connected to the main control board.

Fixes:

  • Power Reset: Attempt to reset the dishwasher by turning it off at the circuit breaker or unplugging it for a few minutes, and then turning it back on. This may clear temporary electrical issues.
  • Professional Assistance: If the “E05” error code persists or if you’re unsure about addressing the wash arm diverter circuit issue, it’s recommended to contact a qualified appliance technician for proper diagnosis and repair.

Error Code: E06

The “E06” error code on a Bosch dishwasher indicates a door sensor circuit fault or error. This error suggests a problem with the door sensor circuitry, which is responsible for detecting the status of the dishwasher door.

Possible Causes:

  • Door Sensor Circuit Issue: There may be a malfunction or fault in the door sensor circuitry, including the sensor itself or the wiring connected to it.

Fixes:

  • Door Inspection: Carefully inspect the dishwasher door to ensure it is properly closed and latched. Sometimes, a loose or improperly closed door can trigger this error.
  • Power Reset: Attempt to reset the dishwasher by turning it off at the circuit breaker or unplugging it for a few minutes, and then turning it back on. This may clear temporary electrical glitches.

Error Code: E07

The E07 error code in a Bosch dishwasher indicates that the Zeolite (Crystal Dry) fan motor is defective. This component is crucial for the drying function in dishwashers equipped with Zeolite technology.

Possible Causes:

  • Malfunctioning Fan Motor: The motor that drives the Zeolite fan might be faulty or broken.
  • Electrical Connection Issues: Problems with the wiring or connections to the fan motor.
  • Control Module Fault: The dishwasher’s control system could be failing to properly operate the fan motor.
  • Obstruction in Fan Area: Physical blockages preventing the fan from rotating correctly.

Fixes:

  • Replace Fan Motor: If the motor is found to be defective, it will need to be replaced.
  • Check Electrical Connections: Ensure all connections to the fan motor are secure and in good condition.
  • Control Module Assessment: Have a technician evaluate the control module for any malfunctions.
  • Clear Fan Obstructions: Remove any debris or obstructions that might be hindering the fan’s movement.

Error Code: E09

The E09 error code in a Bosch dishwasher indicates an issue with the dishwasher’s heating element.

Possible Causes:

  • Malfunctioning Heating Element: The element itself might be faulty or damaged.
  • Wiring Issues: Problems with the electrical connections to the heating element.
  • Control Module Fault: The dishwasher’s control module may not be functioning correctly, affecting the heater’s operation.

Fixes:

  • Replace Heating Element: If the element is damaged, it needs to be replaced.
  • Check and Repair Wiring: Inspect and fix any loose or damaged wires.
  • Control Module Assessment: Have a technician check and possibly replace the control module.

Error Code: E10

The E10 error code in a Bosch dishwasher indicates a problem with the Zeolite (Crystal Dry) chamber heater.

Possible Causes:

  • Zeolite Chamber Heater Issue: The heater within the Zeolite chamber may be malfunctioning.
  • Wiring or Connection Faults: Problems with the electrical connections to the Zeolite chamber heater.
  • Control Module Error: The dishwasher’s control system may not be regulating the Zeolite chamber heater properly.

Fixes:

  • Inspect and Replace Zeolite Heater: The heater might need to be examined and potentially replaced if it’s found to be faulty.
  • Electrical Check and Repair: Ensure all connections to the heater are secure and in good condition.
  • Control Module Check: Have a professional assess the control module for any faults and repair or replace it if necessary.

Error Code: E12

The E12 error code in a Bosch dishwasher indicates limescale build-up in the heat pump

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Possible Causes:

  • Limescale Accumulation: Hard water minerals have accumulated in the heat pump.
  • Reduced Water Flow: Limescale may be restricting water flow within the system.
  • Heat Pump Efficiency: The build-up could be affecting the heat pump’s ability to function efficiently.

Fixes:

  • Descale the Dishwasher: Run a descaling solution through the dishwasher to remove limescale.
  • Clean the Heat Pump: Manually clean the heat pump, focusing on removing any limescale deposits.
  • Regular Maintenance: Use water softeners or regularly descale the dishwasher to prevent future build-up.

Error Code: E14

The E14 error code in a Bosch dishwasher indicates a problem with the flow meter, impacting water flow into the dishwasher or the filling system.

Possible Causes:

  • Flow Meter Malfunction: The flow meter, which measures the amount of water entering the dishwasher, may be faulty.
  • Inlet Valve Issues: Problems with the water inlet valve may prevent proper water flow.
  • Clogged Filters: Blockages in the filters can restrict water flow.
  • Control Module Error: The dishwasher’s control system may not be accurately monitoring or controlling the water flow.

Fixes:

  • nspect and Replace Flow Meter: Check the flow meter for faults and replace it if necessary.
  • Examine Inlet Valve: Ensure the inlet valve is functioning correctly and replace it if it’s faulty.
  • Clean Filters: Regularly clean the dishwasher filters to prevent clogs.
  • Control Module Assessment: Have a technician examine the control module for any malfunctions.
  •  

Safety Reminder

Due to the complexity of these components and the potential for electrical hazards, it’s recommended to seek assistance from a qualified appliance technician for diagnosing and repairing these issues.

Error Code: E15

The E15 error code in a Bosch dishwasher signifies that the safety switch has detected water in the base (drip pan) of the dishwasher, activating the leakage protection system.

Possible Causes:

  • Water Leakage: There’s a leak within the dishwasher allowing water to accumulate in the base.
  • Faulty Seals or Gaskets: Worn-out seals or gaskets around the door or other components could be causing water to escape.
  • Overflow: Issues with the dishwasher’s water management system leading to overflow.
  • Drainage Problems: Blockages or malfunctions in the drainage system could cause water to back up.

Fixes:

  • Identify and Repair Leaks: Check for visible signs of leaks and repair any damaged parts or hoses.
  • Replace Seals and Gaskets: Inspect and replace any worn-out seals or gaskets.
  • Check Water Management System: Ensure the dishwasher isn’t filling with too much water and that the float switch is functioning correctly.
  • Clear Drainage System: Clean and unclog the dishwasher’s drainage pathways.

Error Code: E16

The E16 error code in a Bosch dishwasher indicates that the dishwasher is overfilling with water.

Possible Causes:

  • Faulty Water Inlet Valve: The valve might not be closing properly, leading to excessive water entering the dishwasher.
  • Pressure Switch Issue: The pressure switch, which regulates water level, could be malfunctioning.
  • Control Module Error: The control module may incorrectly manage the water intake, causing overfilling.
  • Blocked Filters or Hoses: Clogs in the system can affect the dishwasher’s ability to regulate water levels.

Fixes:

  • Replace Water Inlet Valve: If the valve is defective, it needs to be replaced to prevent overfilling.
  • Inspect Pressure Switch: Check and replace the pressure switch if it’s not functioning correctly.
  • Control Module Assessment: Have a technician evaluate and possibly repair or replace the control module.
  • Clean and Unblock System: Regular cleaning of filters and checking for blockages in hoses can help maintain proper water flow.

Error Code: E17

The E17 error code in a Bosch dishwasher signifies that water is entering the dishwasher too quickly, potentially leading to issues with the filling system.

Possible Causes:

  • Malfunctioning Water Inlet Valve: The valve may not be regulating the flow of water correctly, allowing too much water to enter quickly.
  • Flow Sensor Issue: A faulty flow sensor could incorrectly measure the rate of water entering the dishwasher.
  • Control Module Malfunction: The dishwasher’s control system might not be managing the water intake properly.
  • Water Pressure Problems: High water pressure from the home’s supply could cause rapid water entry.

Fixes:

  • Inspect and Replace Water Inlet Valve: Ensure the inlet valve is functioning correctly and replace it if it’s faulty.
  • Check the Flow Sensor: Evaluate the condition of the flow sensor and replace it if necessary.
  • Control Module Check: Have a professional assess the control module for any faults.
  • Regulate Water Pressure: If high water pressure is a concern, consider installing a pressure regulator to manage the water entering the dishwasher.

Error Code: E18

The E18 error code in a Bosch dishwasher indicates a problem with water flow into the dishwasher, characterized by a too-low water level or incorrect water pumping.

Possible Causes:

  • Water Inlet Valve Issues: The valve may not be opening correctly, leading to insufficient water entering the dishwasher.
  • Blocked Filters or Hoses: Clogs in the filters or hoses can restrict the water flow.
  • Faulty Circulation Pump: The pump responsible for circulating water might be malfunctioning.
  • Control Module Problems: The dishwasher’s control system may not be accurately regulating the water level.

Fixes:

  • Inspect and Repair Water Inlet Valve: Check the inlet valve for proper function and replace it if necessary.
  • Clean Filters and Hoses: Remove any blockages in filters and hoses to ensure free water flow.
  • Circulation Pump Assessment: Evaluate the circulation pump’s condition and repair or replace it if it’s faulty.
  • Control Module Evaluation: Have a technician check and possibly repair or replace the control module.

Error Code: E19

The E19 error code in a Bosch dishwasher indicates a fault in the detergent dispenser solenoid circuit.

Possible Causes:

  • Faulty Dispenser Solenoid: The solenoid that controls the opening of the detergent dispenser might be malfunctioning.
  • Wiring Issues: Problems with the electrical wiring connected to the dispenser solenoid.
  • Control Module Error: The control module may not be correctly operating the dispenser mechanism.
  • Blocked Dispenser: Physical obstructions or residue in the detergent dispenser could be causing an issue.

Fixes:

  • Replace Dispenser Solenoid: If the solenoid is defective, it should be replaced.
  • Check and Repair Wiring: Inspect and fix any issues with the wiring connected to the dispenser solenoid.
  • Control Module Assessment: Have a technician evaluate the control module for faults.
  • Clean the Detergent Dispenser: Regularly clean the dispenser to prevent blockages.

Error Code: E20

The E20 error code in a Bosch dishwasher indicates a fault or error with the internal heater of the heat pump.

Possible Causes:

  • Malfunctioning Heat Pump Heater: The heater within the heat pump might be faulty or damaged.
  • Electrical Connection Issues: Problems with the electrical connections or wiring to the heat pump heater.
  • Control Module Fault: The dishwasher’s control system could be misinterpreting signals from the heat pump heater.
  • Thermostat Malfunction: A malfunctioning thermostat could lead to improper heater operation.

Fixes:

  • Inspect and Replace Heat Pump Heater: Check the heat pump’s heater for damage and replace it if necessary.
  • Secure Electrical Connections: Ensure all connections and wiring to the heater are intact and secure.
  • Control Module Check: A technician should assess the control module for errors and fix them.
  • Thermostat Evaluation: Ensure the thermostat is functioning correctly.

Error Code: E21

The E21 error code in a Bosch dishwasher indicates that the heat pump is blocked, impairing its function.

Possible Causes:

  • Obstruction in Heat Pump: There might be debris or foreign objects blocking the heat pump.
  • Mechanical Failure: Components within the heat pump, like impellers, could be jammed or broken.
  • Circulation Issues: Problems with water circulation might be affecting the heat pump’s operation.
  • Faulty Heat Pump Motor: The motor that drives the heat pump could be malfunctioning.

Fixes:

  • Remove Obstructions: Check the heat pump for any visible obstructions and carefully remove them.
  • Inspect Mechanical Components: Examine the heat pump’s internal components for damage or malfunction and repair or replace as needed.
  • Ensure Proper Water Circulation: Verify that the dishwasher is filling and draining correctly to maintain adequate water circulation.
  • Evaluate Heat Pump Motor: Have a professional check the motor for any signs of failure and replace it if necessary.

Error Code: E22

The E22 error code in a Bosch dishwasher indicates that the dishwasher filter is blocked. This is a common issue caused by food particles and debris accumulating in the filter.

Possible Causes:

  • Accumulation of Food Particles: Food remnants and debris trapped in the filter.
  • Insufficient Cleaning: Infrequent or improper cleaning of the filter.
  • Drainage Problems: A blocked filter can lead to issues with water draining properly from the dishwasher.

Fixes:

  • Clean the Filter: Remove the filter, clean it thoroughly under running water, and remove any trapped debris.
  • Regular Maintenance: Establish a routine of cleaning the filter regularly to prevent blockages.
  • Check for Additional Blockages: After cleaning the filter, check other areas like the spray arms and drain hose for any additional obstructions.
  • Ensure Correct Installation: After cleaning, make sure the filter is correctly reinstalled in the dishwasher.

Error Code: E23

The E23 error code in a Bosch dishwasher indicates a problem with the drain pump, suggesting that it might be blocked, clogged, or faulty.

Possible Causes:

  • Blocked or Clogged Drain Pump: Debris or food particles obstructing the drain pump.
  • Drain Pump Failure: The pump may be malfunctioning or broken.
  • Obstructed Drain Hose: The hose leading to the drain pump could be kinked or clogged.
  • Electrical Issues: Wiring problems affecting the pump’s operation.

Fixes:

  • Clear the Drain Pump: Inspect and remove any blockages in the drain pump.
  • Check and Replace Drain Pump: If the pump is faulty, it may need to be replaced.
  • Inspect and Clear Drain Hose: Ensure the drain hose is not obstructed or kinked.
  • Electrical Connections: Check the wiring and connections to the drain pump for any faults.
Dealing with electrical components and plumbing in dishwashers requires care and technical knowledge. To ensure safety and proper functionality, it’s advisable to consult with a professional appliance repair technician for diagnosing and addressing these issues. Regular maintenance and checking for blockages can help prevent such problems.

Error Code: E24

The E24 error code in a Bosch dishwasher suggests that the dishwasher is not draining properly, often due to a blocked drain filter.

Possible Causes:

  • Blocked Drain Filter: Accumulation of food particles and debris in the drain filter.
  • Clogged Drain Hose: The hose that leads to the drain might be obstructed or kinked.
  • Drain Pump Issue: Problems with the drain pump, such as blockages or malfunction.
  • Siphoning Issue: Incorrect installation of the drain hose leading to siphoning problems.

Fixes:

  • Clean the Drain Filter: Remove and thoroughly clean the drain filter, removing any trapped debris.
  • Inspect and Clear Drain Hose: Check the drain hose for clogs or kinks and clear any obstructions.
  • Evaluate Drain Pump: Ensure the drain pump is functioning properly and clear any blockages inside it.
  • Check Hose Installation: Verify that the drain hose is installed correctly to prevent siphoning.

Error Code: E25

The E25 error code in a Bosch dishwasher indicates that the drain pump is blocked, or the drain pump cover is loose or missing.

Possible Causes:

  • Blocked Drain Pump: Debris, food particles, or foreign objects obstructing the drain pump.
  • Loose or Missing Drain Pump Cover: The cover that secures the drain pump may be improperly fitted or absent.
  • Clogged Filters or Hoses: Blockages in the dishwasher’s filters or hoses could affect the drain pump’s function.
  • Drain Pump Malfunction: The drain pump itself might be faulty or damaged.

Fixes:

  • Clear Drain Pump Blockage: Inspect and remove any obstructions found in the drain pump.
  • Secure or Replace Drain Pump Cover: Ensure the drain pump cover is properly installed and replace it if it’s missing.
  • Clean Filters and Hoses: Regularly clean dishwasher filters and check hoses for blockages.
  • Inspect and Repair Drain Pump: If the pump is malfunctioning, it may need to be repaired or replaced.

Error Code: E27

The E27 error code in a Bosch dishwasher indicates that the house’s power supply to the unit is too low. This suggests a voltage issue where the dishwasher is not receiving sufficient electrical power to operate properly.

Possible Causes:

  • Low Voltage in Home’s Electrical System: The overall voltage in the house might be below the required level for the dishwasher.
  • Faulty Electrical Outlet: The specific outlet powering the dishwasher could be delivering insufficient voltage.
  • Circuit Breaker Issues: A problem with the home’s circuit breaker or wiring could be causing low voltage to the appliance.
  • Power Surge or Fluctuations: Recent power surges or fluctuations in the home’s electrical system.

Fixes:

  • Check Home Voltage: Use a voltage meter to check the overall voltage levels in your home, especially at the outlet used for the dishwasher.
  • Inspect and Test Electrical Outlet: Ensure the outlet is functioning correctly and providing the necessary voltage.
  • Evaluate Circuit Breaker: Check the home’s circuit breaker or fuse box for any issues that might affect voltage supply.
  • Consult an Electrician: If voltage issues are detected, it’s advisable to consult a qualified electrician to address the problem safely and effectively.

Get Your Bosch Dishwasher Fixed Right

If you fixed your Bosch dishwasher by yourself, that's awesome! But if you're not good with technical stuff or couldn't fix it, that's why our experts are here. We can find out what's really wrong with it, even if it seems like a different problem at first. It's important to let a pro figure it out and fix it the right way. Just contact us, and we'll send someone to check your Bosch dishwasher so it can dry your clothes properly again.
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