Samsung Dishwasher Error Code HC — High Temperature Heater Error
What this means
Error code HC indicates the dishwasher's internal temperature has risen above the safe threshold. The control board detects this condition through the temperature sensor and stops the cycle to prevent damage. Common causes include a stuck heating element relay, a faulty temperature sensor, or a malfunctioning control board that keeps the heater running too long.
Step-by-step fix
4 stepsTurn off power at the circuit breaker
Switch off the circuit breaker that supplies power to the dishwasher. Wait at least 5 minutes for the unit to cool down and the control board to reset.
Do not open the dishwasher door immediately — the water inside may be dangerously hot.
Allow the dishwasher to cool
Wait at least 30 minutes with the power off before opening the door. Once cool, empty the dishwasher of all dishes and standing water.
If steam rushes out when you open the door, close it and wait longer.
Test the heating element
Access the heating element (DD81-02148A) at the bottom of the tub. Disconnect its wires and test with a multimeter for continuity. Also check if the element is shorted to ground by placing one probe on a terminal and the other on the metal tub.
A shorted element can cause continuous heating and must be replaced immediately.
Run a test cycle
Restore power, add detergent, and run a normal cycle with the dishwasher empty. Monitor for the HC code. If it does not reappear, the issue was likely a temporary sensor anomaly.
If the code returns, the temperature sensor or control board relay is likely at fault and needs professional diagnosis.
When to call a professional
If the HC code returns after replacing the heating element, the main control board may have a stuck relay. A technician should diagnose the control board and temperature sensor circuit.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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