Whirlpool ice maker displays E3 and shuts down mid-cycle

Safety: Turn off power and shut off the water supply before accessing internal components.

• Locate the water inlet thermistor: On many Whirlpool models, this sensor is clipped to the water inlet tube or reservoir area.
• Check mounting: Ensure the thermistor is firmly attached to the tubing or surface it is meant to monitor. A loose sensor can read incorrectly and trigger E3.
• Test the thermistor: Disconnect the sensor and measure resistance at room temperature. Compare to Whirlpool’s temperature/resistance chart. Replace if readings are open, shorted, or far off spec.
• Inspect wiring: Follow the harness to the control board, checking for pinched, cut, or corroded wires. Repair or replace damaged sections and reseat connectors.
• Restore power and test: After reassembly, restore power and run a diagnostic or normal cycle. If E3 persists with a good sensor and wiring, the main control board may require replacement.