Bosch Dishwasher Error Code E23 — Drain Pump Electrical Fault
What this means
The E23 error indicates an electrical fault with the drain pump — the pump motor may have failed, a wire connection is broken, or the control board is not sending power to the pump. Unlike E24/E25 which indicate blockages, E23 specifically points to an electrical issue.
Step-by-step fix
3 stepsPower cycle the dishwasher
Turn off the breaker for 5 minutes and restart. Try running a drain-only cycle.
Listen carefully for the drain pump — if you hear nothing at all, the pump is likely not receiving power.
Check pump wiring
Unplug the dishwasher and inspect the wiring connections to the drain pump for loose, burned, or corroded terminals.
The drain pump is located at the bottom of the dishwasher, accessible by removing the kick plate.
Test the drain pump motor
Use a multimeter to test the drain pump motor for continuity. A reading of infinite resistance means the motor winding is open.
Typical drain pump resistance is 50–200 ohms depending on the model.
When to call a professional
If the pump motor tests open or the wiring is damaged, a technician should replace the pump and inspect the wiring harness.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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