Bosch Dishwasher error code E03 — There is a main control board relay fault/error.

What is the brand for Bosch Dishwasher error code E03 — There is a main control board relay fault/error.?

For Bosch Dishwasher error code E03, meaning is There is a main control board relay fault/error, verified against its source on 2026-08-04.

See more Error Code E03 There is a main control board relay fault/error. Reset power to breaker for 30 seconds. If not resolved, call Bosch Customer Support at 1-800-944-2904 for assistance. See more Error Code E04 Your dishwasher has detected faulty (heater) electronics in the self-test.

— bosch-home.com, retrieved 2026-08-04