Power Module Error – Code E03
The Bosch Dishwasher E03 error code indicates a power module issue, specifically involving the working or safety relay for the auxiliary heater. This error can also result from an overheated power module, which may prevent the dishwasher from operating correctly.
Possible Causes of the E03 Error Code
- Defective power module
- Faulty relay for the auxiliary heater
- Safety relay malfunction
- Overheating of internal electronic components
How to Fix the Bosch Dishwasher E03 Error Code
- Unplug the dishwasher and allow it to cool down completely.
- Inspect the power module for signs of burn marks or overheating.
- Check the relays—especially those linked to the auxiliary heater.
- If you’re unsure or lack technical expertise, contact a certified Bosch technician to diagnose and replace any defective parts.
Prompt diagnosis and repair can help prevent further damage to your appliance and restore normal function quickly.
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