Bosch Dishwasher Error Code E18: Meaning & How to Fix It

By the ErrorCodePro Editorial Team · Last reviewed October 20, 2026

Bosch dishwasher error code E18 means: Water flow into the dishwasher is a problem: the water level is too low or water is not being pumped correctly. [1] Keep using it? Not until the cause is fixed. Start with the owner checks below, beginning with: check the inlet hose.

Quick facts

Code	E18
Also shown as	E3200
Brand / appliance	Bosch dishwasher
System	Water fill
Official meaning	Water flow into the dishwasher is a problem: the water level is too low or water is not being pumped correctly. [1]
Keep using it?	Not until the cause is fixed
DIY-safe?	Owner checks only (listed below)
Support	Bosch Customer Support: 1-800-944-2904

On this page: Meaning · Steps · Parts · When to call a technician · Related codes · FAQ

What error code E18 means on a Bosch dishwasher

Water flow into the dishwasher is a problem: the water level is too low or water is not being pumped correctly. [1]

This is a water fill code. Codes and wording can vary by model, so check your owner's manual for your model number.

How to fix Bosch dishwasher error code E18 (safe owner checks)

Safety first: disconnect power before you remove any panel or reach into the sump or drum. Do not touch wiring, the control board or the motor. If you see water near electrical parts, stop and call a technician. These steps are based on Bosch's published guidance [1], rewritten for clarity.

Check the inlet hose. Make sure the inlet hose is not kinked or damaged.
Check the water supply. Make sure the water supply is turned on. Bosch states the flow rate should be 10 L/min.
Contact Bosch if it persists. Call Bosch Customer Support at 1-800-944-2904.

Parts that may be involved

Exact parts depend on your model number. This page lists part types only, never part numbers.

No specific part is implied by the manufacturer's guidance for this code.

When to call a technician

Supply and hose are fine but E18 persists
Anything involving wiring, the control board, the motor or the water valve electrics
The appliance is under warranty: contact Bosch Customer Support: 1-800-944-2904 first

Frequently asked questions

What does error code E18 mean on a Bosch dishwasher?

Bosch lists E18 as follows: Water flow into the dishwasher is a problem: the water level is too low or water is not being pumped correctly.

Is it safe to keep using the dishwasher with E18?

Not until the cause is fixed.

Can I fix Bosch dishwasher error E18 myself?

Only with the owner checks on this page, starting with: check the inlet hose. If it persists, call a technician or Bosch Customer Support: 1-800-944-2904.

Is E3200 the same as E18?

Yes. Bosch's documentation lists E3200 with the same meaning as E18; the display format depends on the model.

Sources

Bosch Home US: Dishwasher Error Codes (official)

Last reviewed: October 20, 2026. ErrorCodePro is not affiliated with Bosch.