How to Fix Samsung Dishwasher Error Normal + Smart Auto blinking

Error Code: Normal + Smart Auto blinking Difficulty: Moderate

Problem: High temperature heater error (non-digital display)

How to Fix Normal + Smart Auto blinking Error

1. DISCONNECT POWER. Shut off the circuit breaker for the dishwasher.
2. PULL OUT THE DISHWASHER. Disconnect the water and drain lines and pull the unit out from under the counter to access its components.
3. TEST THE THERMISTOR. The thermistor (DD32-00005A) is usually located in the sump assembly at the bottom of the tub. Disconnect its wires and test its resistance with a multimeter. A faulty thermistor will show a reading outside the manufacturer’s specified range (often 8,500 to 126,000 ohms depending on temperature). [2, 3, 5]
4. REPLACE THE THERMISTOR. If the thermistor is faulty, remove it from the sump and install the new one.
5. IF THERMISTOR IS OK, REPLACE MAIN BOARD. If the thermistor tests good, the issue is likely a fault in the Main Control Board (PBA) (DD92-00042A). Locate the board (often behind the front kick-plate or on the side of the unit), carefully label and transfer all wire connections to the new board.
6. REASSEMBLE AND TEST. Reinstall all components, slide the dishwasher back into place, reconnect all lines, and restore power to test.