Dishwasher shows E18 and does not fill with enough water or stops filling early.

Safety first: Turn off power and close the water supply valve before disconnecting hoses.

• Open shutoff valve fully: Verify the under-sink or wall valve is fully open.
• Inspect and clean inlet screen: Disconnect the inlet hose from the dishwasher and clean the mesh filter inside the valve or AquaStop housing.
• Check hose routing: Ensure the hose is not kinked or pinched behind the dishwasher.
• Test inlet valve coil: With power off, measure the resistance of the inlet valve coil. An open circuit indicates a failed valve that must be replaced.
• Run a test cycle: After cleaning and reassembly, run a short cycle to confirm proper filling.