E18 Moderate Easy DIY

Bosch Dishwasher E18 — No Water Flow / Drain Fault

Bosch Dishwasher · Error code E18

What E18 Means

E18 means the dishwasher is not sensing proper water flow — usually a drainage restriction or the flow sensor not detecting circulation.

Symptoms

  • Dishwasher stops mid-cycle
  • Water not circulating or draining
  • E18 on the display

Common Causes

1
Clogged filter / drain path

Debris in the bottom filter or drain restricting flow. Clean first.

2
Drain pump or check valve stuck

A jammed pump impeller or stuck check valve.

3
Low water supply

A partly closed supply valve limits flow.

How to Fix It

  1. Clean the bottom filter and sump.
  2. Check the drain hose, air gap, and pump impeller for blockages.
  3. Confirm the supply valve is fully open.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement Bosch Dishwasher Drain Pump View on Amazon→

More Bosch Dishwasher Codes

E01 E01 — Control board fault E02 E02 — Heating element / NTC sensor fault E03 E03 — Water not heating E04 E04 — Water flow / flow meter fault E05 E05 — Overfill / float switch tripped E06 E06 — Door switch / lock fault

All Bosch codes → All dishwasher codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.