Bosch · Dishwasher
Bosch Dishwasher E04 Code: Meaning & Troubleshooting
Service if the code returnserror code
Bosch E04 means the dishwasher detected faulty heater electronics during self-test.
First thing to do
Bosch directs E04 to customer support.
Can I keep using it? Heater electronics are professional-only.
DIY level: Stop — professional guidance required
See the stop instructionsInteractive troubleshooter
Follow the official checks one at a time. A code and your answers do not confirm a failed part.
Model number (optional)
Brand / appliance verified. Exact model not checked.
Scope: Bosch dishwashers covered by the cited official US error-code index. Model stays in this tab; it is excluded from analytics.
Stop — professional guidance recommended
Heater electronics are professional-only.
Bosch directs E04 to customer support.
Bosch E04 means the dishwasher detected faulty heater electronics during self-test. The source does not establish which component has failed from these answers. Do not continue into electrical testing, gas work, wiring, or disassembly.
Give support the model, displayed code, and checks listed below. Check warranty coverage before paying for service. A written quote lets you compare repair with replacement.
Repair or Replace?Your check history
No checks completed yet.
Professional service guidance
Bosch directs E04 to customer support.
- Contact Bosch support for E04.
Separate hazard signs such as smoke, flooding, sparks, or a burning smell require the manufacturer's safety instructions.
Official meaning, scoped to this source
Bosch E04 means the dishwasher detected faulty heater electronics during self-test.
- Manufacturer
- Bosch
- Document
- Bosch Dishwasher Error Codes · Official error-code index
- Product family
- Bosch dishwashers
- Market and locale
- US · en-US
This is an official-source interpretation for the stated scope, not a confirmed diagnosis. Meaning can change across brands, models, product families, and markets.
Market, product family, and model applicability
US · en-US · Bosch dishwashers covered by the cited official US error-code index
Exact model applicability has not been verified.
This release retains family or source-index scope only. Do not infer that an arbitrary model uses this code; confirm it in the exact manufacturer manual.
Open the official model/manual lookup (opens in a new tab)Do not do
Do not access heater electronics, panels, or wiring.
Heater electronics are professional-only.
Check warranty before authorizing service
Warranty coverage depends on the country, model, purchase date, and manufacturer terms. Have the model and serial number available, open the manufacturer's official support or warranty page, and ask whether the service route is authorized before paying for work.
This public record does not make a coverage determination. Use the official model lookup and warranty information linked below.
If the message returns
Contact Bosch support for E04.
Explore the same symptom
Other documented displays for the same brand and appliance with related symptoms. These codes are not interchangeable.
Source and scope
Official source verified at release- Market and locale
- US · en-US
- Product family
- Bosch dishwashers
- Content and safety verified on
- July 26, 2026
- Source updated by manufacturer
- Not supplied in the official record
Bosch
Bosch Dishwasher Error Codes · Official error-code index
Open official source (opens in a new tab)Verification and review status
- Content meaning and safety verifiedJuly 26, 2026
- Source reachability statusOfficial source verified at release
- Automated evidence review completedPassed · July 26, 2026
- Automated safety rules checkPassed for this published safety boundary
- Human technical reviewPending — no human completion is claimed
- Publication gateAutomated publication checks passed · July 26, 2026
- Official-source conflictNo unresolved conflict admitted to this public release
Automated checks and release approval are not a substitute for a qualified service professional or the exact manufacturer manual.
Evidence used for this guidance
E04 section
Source-backed summary
E04 means faulty heater electronics were detected during self-test; contact Bosch support.
Does the model or source look wrong?
Send a privacy-minimal correction signal. It cannot change public content automatically.
Report a model or source mismatchNeed a different display? Return to the decoder.