Dishwasher shows E13; may be associated with unusually hot water or safety shutdown.

Safety first: Turn off power and allow the dishwasher to cool completely before inspection.

• Check inlet water temperature: Run the kitchen hot tap and measure the water temperature. Sharp dishwashers typically require inlet water below about 60°C. Reduce boiler or water heater temperature if necessary.
• Inspect NTC sensor: Access the NTC and check for loose connections or damage. Replace if readings are abnormal.
• Control board check: If the heater continues to heat when it should be off, the heater relay on the control board may be stuck. This requires professional repair or board replacement.
• Reset and test: After correcting water temperature and checking the sensor, reset the dishwasher by disconnecting power for several minutes, then run a short cycle.