Bosch Dishwasher E04 Error Code – Troubleshooting Guide
Error Code: E04
Category: Power Module Error
The Bosch dishwasher E04 error code typically signals a power-related issue, often caused by a ground fault or a malfunctioning heater component. If your Bosch dishwasher displays E04 on the screen, it’s important to address the root cause to restore proper function and prevent further damage.
What Causes the Bosch Dishwasher E04 Error Code?
Several possible issues can trigger the E04 error:
- Ground fault at the zeolite heater
- Ground fault at the heat pump heater
- Defective safety heater relay on the power module
Possible Causes of E04 Error on Bosch Dishwashers
Here are the most common culprits:
- Faulty heat pump heater
- Malfunctioning zeolite heater
- Damaged or loose wire harness connections
- Failed power module
How to Fix the E04 Error on a Bosch Dishwasher
- Unplug the dishwasher and wait a few minutes before restarting to reset the control board.
- Check for visible damage or burning on wires or components.
- Inspect the heaters and relays using a multimeter if you’re experienced with electrical testing.
- Contact Bosch support or a certified technician for repair or part replacement.
⚠️ Note: Electrical repairs can be dangerous. If you’re not confident handling internal components, it’s best to call a professional technician.
I am a master Appliance Repair technician with over 35 years of experience in the field. I am passionate about helping people troubleshoot their appliances and fix common problems. My website, appliancemode.com, provides a wealth of information on troubleshooting common appliance issues and deciphering error codes. This website aims to empower people to tackle appliance repairs themselves and save money on service calls.
