Dishwasher displays E12; fill and drain seem normal but cycle aborts early

Safety first: Turn off power and close the water supply before servicing the water circuit.

• 1. Locate flow meter: The flow meter is typically installed in-line on the cold water inlet to the dishwasher. It may be a small plastic body with two wires.
• 2. Inspect for debris: Remove the flow meter and check the internal turbine for scale or debris that could prevent it from spinning freely. Clean gently with water.
• 3. Check orientation: Ensure the flow meter is installed in the correct direction of flow as indicated by an arrow on the housing.
• 4. Electrical test: With a multimeter set to frequency or pulse counting, verify that the flow meter outputs pulses when water flows through it. No pulses indicate a failed sensor.
• 5. Harness inspection: Check the wiring from the flow meter to the control board for damage or loose connections.
• When to call a technician: If the flow meter and wiring are good but E12 persists, the control board input circuit may be faulty and should be evaluated by a technician.