Dishwasher displays F8; unit may not heat or dry properly.

Safety first: Turn off power at the breaker. Allow the unit to cool.

• Confirm symptom: Run a heated cycle and check if dishes are cold and wet at the end.
• Inspect heater and thermostat: Remove lower rack and visually inspect heater. Access underside to locate high-limit thermostat and wiring.
• Test components: Use a multimeter to check continuity of the heater and thermostat. Replace any open components.
• Check thermistor: Inspect and test the temperature sensor in the sump. Replace if readings are out of specification.
• If all test good: The control board may not be energizing the heater correctly. Professional diagnosis and control replacement may be required.