How to Troubleshoot Bosch Dishwasher Error Code E01

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Experiencing an E01 error code on your Bosch dishwasher can be frustrating. This guide provides clear, easy-to-understand steps to help you troubleshoot and resolve this issue, ensuring your dishwasher runs smoothly again.

Error CodeE01
IndicationPump Circuit Failure or Heating Issue
Common Symptoms– Dishwasher stops mid-cycle
– Water remains in the dishwasher
– Dishes not properly cleaned
– Unusual noises from the dishwasher
Step-by-Step Troubleshooting Guide1. Check the Drain System (Clean drain, inspect impeller, examine drain hose)
2. Reset the Dishwasher (Power cycle)
3. Monitor Water Flow (Check for standing water, listen to motors)
4. Use a Kill A Watt Meter (Measure power usage)
5. Inspect After Power Outages (Reset breakers)
Pump Circuit Failure– Symptoms: Problems with draining, unusual noises
– Troubleshooting: Check drain pump and hose, inspect impeller, electrical check
– Replacement: Replace pump if faulty
Heating Issue– Symptoms: Inadequate drying, lack of hot water, incomplete cycles
– Troubleshooting: Inspect heating element, check thermostat, examine control board
– Replacement: Replace heating element or thermostat if necessary
Control Board Replacement– Consider cost vs. replacement, warranty status
– Replacement steps: Purchase correct board, safety precautions, access and replace the board, reassemble and test
– Tips: Take photos for reference, handle with care, consult the manual
– Alternative: Seek professional help
Preventive Measures– Regular maintenance
– Avoid overloading
– Use correct detergent

Understanding the E01 Error Code

The E01 error code in Bosch dishwashers typically points to a Pump Circuit Failure or a Heating Issue. This error occurs when the dishwasher’s control board detects a problem with the pump control circuit, which can hinder the proper functioning of the dishwasher.

Common Symptoms

  • The dishwasher stops mid-cycle.
  •  Water remains in the dishwasher.
  •  The dishes need to be properly cleaned.
  •  The dishwasher makes unusual noises.

Step-by-Step Troubleshooting Guide

Step 1: Check the Drain System

  • Clean the Drain: Ensure the drain inside the dishwasher is debris-free. Use a shop vac to remove any obstruction.
  •  Inspect the Impeller: Check the impeller for blockages and ensure it moves freely.
  •  Examine the Drain Hose: Ensure the hose running to the sink is clear.

Step 2: Reset the Dishwasher

  • Power Cycle: Unplug the dishwasher or switch off the breaker for at least 30 minutes, then turn it back on.

Step 3: Monitor the Water Flow

  • Check for Water: Observe if there is standing water in the dishwasher. It should drain completely.
  •  Listen to the Motors: You should hear the drain motor, the wash motor, and then the fill valve. Any deviation might indicate a problem.

Step 4: Use a Kill-A-Watt Meter

  • Measure Power Usage: This can help determine if there is an electrical issue with the dishwasher.

Step 5: Inspect After Power Outages

  • If the error started after a power outage, reset all breakers connected to the dishwasher.

Detailed Troubleshooting Guide:

Pump Circuit Failure

Symptoms: Inability to drain water properly, unusual noises during the drain cycle, or water remaining in the dishwasher after a cycle.

  1.  Troubleshooting Steps: Check the Drain Pump and Hose: Ensure there are no clogs or obstructions in the pump or hose.
  2.  Inspect the Impeller: Verify that the impeller in the pump is not damaged and moves freely.
  3.  Electrical Check: Use a multimeter to check the electrical continuity of the pump. If there’s no continuity, the pump might need replacement.

Replacement: If, after checking these components, you find that the pump is indeed faulty (e.g., motor failure, electrical issues), then replacing the pump is the next step.

Heating Issue

Symptoms: Dishes not drying properly, lack of hot water during cycles, or the dishwasher not completing its cycle.

  1.  Troubleshooting Steps: Inspect the Heating Element: Check for visible signs of damage or use a multimeter to test for continuity. No continuity suggests the element needs replacement.
  2.  Check the Thermostat: The thermostat ensures the dishwasher heats to the correct temperature. Test it for continuity.
  3.  Examine the Control Board: Since the control board regulates the heating element, any malfunction could impact heating.

Replacement: If the heating element or thermostat is faulty, replacing these components should resolve the issue. However, if the problem lies within the control board, as discussed earlier, replacement of the board might be necessary.

Do I Need to Replace the Control Board?

Replacing the control board in your Bosch dishwasher could potentially resolve the E01 error code, especially if the troubleshooting steps mentioned earlier don’t rectify the issue. Here’s what you need to consider and the steps to take if you decide to replace the control board:

Considerations Before Replacing the Control Board

  1. Cost vs. Replacement: Evaluate the cost of a new control board against the price of a new dishwasher. Investing in a new appliance might be more cost-effective if your dishwasher is old.
  2.  Warranty Status: Check if your dishwasher is still under warranty. If it is, contact Bosch for a potential free repair.
  3.  Confirming the Issue: Ensure that the control board is the cause of the E01 error. Replacing it without confirmation might not solve the problem if there’s another underlying issue.

Steps to Replace the Control Board

  1. Purchase the Correct Board: Make sure to buy the correct control board model for your specific Bosch dishwasher.
  2.  Safety Precautions: Unplug the dishwasher from the power source to ensure safety.
  3.  Access the Control Board: You will typically need to open the dishwasher’s door and remove the panel on the inside of the door to access the control board.
  4.  Disconnect and Replace: Carefully disconnect the old control board and connect the new one, ensuring all connections are secure.
  5.  Reassemble and Test: After replacing the board, reassemble the dishwasher and run a test cycle to check if the error code has been resolved.

Tips for Replacing the Control Board

  • Take Photos: Before disconnecting the old board, take pictures to remember how to reconnect the new one.
  •  Handle with Care: Electronic components can be sensitive to static electricity and rough handling.
  •  Consult the Manual: Refer to your dishwasher’s manual for instructions on accessing and replacing the control board.

Alternative: Professional Help

If you’re uncomfortable with DIY repairs, it’s advisable to seek help from a professional technician. They have the expertise to accurately diagnose the issue and replace the control board if necessary.

Preventive Measures

  • Regularly clean the filters and load the dishes correctly to keep your dishwasher working well.
  •  Avoid overloading the dishwasher.
  •  Use the correct type of detergent as recommended by Bosch.


The E01 error code in Bosch dishwashers typically indicates a problem with the pump circuit or heating system. Following the steps outlined in this guide, you can troubleshoot and resolve the issue. If the problem persists, contacting a professional technician is recommended.

Remember, regular maintenance and proper usage are key to ensuring the longevity and efficient performance of your Bosch dishwasher.

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Ubaid Hassan
Ubaid Hassan

Introducing Ubaid Hassan – the expert who knows all about fixing dishwashers. Ubaid understands how dishwashers work and is really good at finding and solving problems. Ubaid is the person to ask for helpful advice and solutions. Loving both dishwashers and taking care of the environment, Ubaid can share smart ideas to help you use your dishwasher well and be kind to nature.

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