# E04 — Appliance fault and error codes

For E04, brand is Bosch; appliance type is Dishwasher; meaning is Your dishwasher has detected faulty (heater) electronics in the self-test, verified against its source on 2026-08-04.

- **Brand:** Bosch
- **Appliance type:** Dishwasher
- **Error code:** E04
- **Meaning:** Your dishwasher has detected faulty (heater) electronics in the self-test.

## What the source says

> See more Error Code E04 Your dishwasher has detected faulty (heater) electronics in the self-test. Contact Bosch Customer Support at 1-800-944-2904 for assistance.

## Source

- https://www.bosch-home.com/us/owner-support/dishwashers/error-codes

Last verified: 2026-08-04. Review by: 2027-08-04.
Part of [Appliance fault and error codes](https://referencesource.org/appliance-fault-error-codes/).