Bosch Dishwasher Error Codes E01–E27 Guide

Scope and model check

This collection follows the Bosch US dishwasher error-code support index checked 8 September 2026. It covers 23 distinct base codes listed there. Bosch says the exact code set and repair instructions depend on the dishwasher's model number (E-Nr), so treat these pages as a starting reference, not a universal code dictionary.

Start with Bosch's official dishwasher error-code index, then open the manual for the rating-plate model. Bosch's SHX4AEF5N 100 Plus product page shows where model manuals live, while the Bosch use-and-care reference confirms the E:XX display convention.

Do not remove covers, probe live wiring, bypass a door or leak safety, or work on mains, gas or water connections unless the exact manual authorizes the step and you are qualified to do it. Shut off the water and arrange service when Bosch says to do so.

Documented Bosch dishwasher codes

Use the complete code shown on the display. The short descriptions below only summarize Bosch's published meaning; open the matching guide for the safe checks and stop conditions.

• E01 — heat-pump motor circuit fault at the main control board.
• E02 — main control-board relay fault.
• E03 — main control-board relay fault.
• E04 — faulty heater electronics detected in self-test.
• E05 — wash-arm diverter circuit fault at the control board.
• E06 — door-sensor circuit fault.
• E07 — Zeolite/Crystal Dry fan-motor fault.
• E09 — heat-pump internal-heater fault.
• E10 — Zeolite/Crystal Dry chamber-heater fault.
• E12 — limescale build-up in the heat pump.
• E14 — flow-meter or filling-system issue.
• E15 — water detected in the base; leakage protection activated.
• E16 — water-flow or filling-system issue.
• E17 — water-flow or filling-system issue.
• E18 — low water level or incorrect water pumping.
• E19 — detergent-dispenser solenoid circuit fault.
• E20 — heat-pump internal-heater fault.
• E21 — heat pump blocked.
• E22 — dishwasher filter blocked.
• E23 — drain-pump issue.
• E24 — drainage problem, commonly a blocked filter or hose.
• E25 — blocked drain pump or loose/missing pump cover.
• E27 — house power supply to the dishwasher is too low.

How to use this collection

Photograph the display, find the rating plate on the door edge, and use Bosch's manual lookup for the exact E-Nr. A reset can clear a temporary control state, but it does not prove that a heater, pump, leak or control-board fault is repaired. When a guide says to turn off the water, contact Bosch or call an electrician, follow that boundary.