Bosch Dishwasher Error E18: What It Means and How to Fix It
Short answer
E18 on a Bosch dishwasher means: problem with water flow into the dishwasher: water level too low, or water not being pumped correctly. First step: Check the inlet hose for kinks or damage.
Water level too low / water not pumped correctly
Likely causes
- Kinked inlet hose
- Blocked strainers in the inlet/AquaStop hose
- Blocked or limescaled tap, low water pressure
How to fix it
- 1Check the inlet hose for kinks or damage.
- 2Confirm the water supply is on; about 10 l/min should flow.
- 3Then contact Bosch customer service.
Safety
- The AquaStop safety valve contains an electric valve – do not immerse it in water.
When to call a professional: If supply and hose are fine and the code remains.
Applies to: Bosch dishwashers
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Source
Based on Bosch's official error code information: Bosch US – Dishwasher Error Codes. Last checked 2026-10-28. Codes and their meaning can differ by model and region; check your appliance's manual.
Frequently asked questions
What does Bosch dishwasher error code E18 mean?
Problem with water flow into the dishwasher: water level too low, or water not being pumped correctly.
How do I fix E18 on a Bosch dishwasher?
Check the inlet hose for kinks or damage. Confirm the water supply is on; about 10 l/min should flow. Then contact Bosch customer service.
When should I call a technician for E18?
If supply and hose are fine and the code remains.