Dishwasher shows F3E1 and may stop mid-cycle or not start, often with incorrect water temperature.

Safety first: Disconnect power and turn off water supply.

• Locate thermistor: On many Amana dishwashers, the thermistor is integrated with or near the sump assembly at the bottom of the tub.
• Inspect wiring: Remove the lower access panel and check the harness from the thermistor to the control board for damage or loose connections.
• Test thermistor: With a multimeter, measure resistance across the thermistor terminals. Compare to the resistance chart in the tech sheet (typically several kΩ at room temperature). An open or zero reading indicates a bad sensor.
• Check for scale buildup: Heavy mineral deposits on the sensor can affect readings. If accessible, gently clean the sensor surface.

Repair action: Replace the thermistor or sump assembly if the sensor is out of specification or physically damaged. If the sensor tests good but F3E1 persists, the main control board may need replacement.