Dishwasher stops mid-cycle and displays E1; cycle may not start or may abort shortly after filling.

Safety first: Turn off power to the dishwasher at the breaker and close the water supply valve before working on the unit.

• Check household water supply: Verify the shutoff valve under the sink feeding the Dacor dishwasher is fully open. Ensure there are no kinks in the stainless or plastic supply line.
• Inspect inlet hose and screen: Shut off water, disconnect the inlet hose at the dishwasher. Check the small metal or plastic screen in the Dacor water inlet valve for debris (sand, scale). Clean gently with a soft brush and reinstall.
• Confirm water pressure: Low water pressure can trigger E1. Run a nearby faucet; if flow is weak, address plumbing issues before further dishwasher diagnosis.
• Test the water inlet valve: With power off, access the bottom front of the dishwasher. Locate the Dacor water inlet valve. Check for obvious cracks or leaks. If you have a multimeter and are qualified, test coil resistance against Dacor specs. Replace the valve if open, shorted, or mechanically stuck.
• Reset and test: Restore power and water, then run a short cycle. If E1 returns after confirming supply and valve, the issue may be with the control board or flow sensor and may require a professional technician.