What does error code E18 mean on a Bosch dishwasher?

Water level too low. The water level is too low, or water isn't being pumped correctly.

Can I fix Bosch code E18 myself?

Start with these safe checks: Check that the inlet hose isn't kinked or damaged. Make sure the water supply valve is fully on. Bosch says flow should be about 10 liters (2.6 gallons) per minute. If supply is fine and E18 continues, contact Bosch support.

When should I call a technician for code E18?

If supply is fine and E18 continues, contact Bosch support. Unplug it or switch the breaker off before you remove any panel. Don't test or replace wiring, control boards, heating elements or motors under power. If you see scorching, smell burning, or the breaker trips again, leave it off and call a qualified appliance technician or electrician.

Bosch Dishwasher Error Code E18 / E:18: Water level too low

What E18 means

The water level is too low, or water isn't being pumped correctly.

Also shown as: E:18, depending on the model.

Likely causes

Water supply valve closed or partly closed
Kinked inlet hose

Safe first checks

Check that the inlet hose isn't kinked or damaged.
Make sure the water supply valve is fully on. Bosch says flow should be about 10 liters (2.6 gallons) per minute.

When to stop

If supply is fine and E18 continues, contact Bosch support.

Checked against: Bosch USA: Bosch dishwasher error codes troubleshooting guide. Codes can differ by model and year, so confirm with your owner's manual.