Samsung Dishwasher Error Code Temperature Sensor error / Heater error / High temperature heating error

This error indicates a functional fault in the dishwasher's thermal system, covering the temperature sensor, the heating element, or a detected over-temperature condition. The control board monitors water temperature throughout every cycle, and when the sensor signal or heating performance falls outside expected parameters, the machine stops and displays this error. It is a protective measure designed to prevent damage to the appliance or its contents.

You should not continue running the dishwasher while this error is active. The fault indicates the appliance cannot reliably monitor or control water temperature, which could result in water that is too hot or a heating element that does not shut off properly. Turn off the circuit breaker for the dishwasher until the problem is diagnosed and resolved.

Repair costs vary depending on which component has failed. A replacement thermistor is generally an inexpensive part, with labor and parts typically ranging from $75 to $150. A heating element replacement tends to cost more, often in the $150 to $300 range including labor. Control board repair or replacement is the most expensive scenario, potentially ranging from $200 to $400 or more, which may affect the decision to repair versus replace the unit.

The first step is to run a fresh cycle with the dishwasher empty and detergent added, which Samsung recommends to rule out a temporary glitch. If the error persists after that test cycle, the repair likely involves replacing the thermistor, testing the heating element for continuity, or inspecting wiring connections, tasks that are manageable for experienced DIYers with a multimeter. If those checks do not resolve the issue, the control board relay may be at fault, which generally requires a service technician.

Turning off the circuit breaker and restarting the dishwasher may temporarily clear the error display, but if the underlying component has failed, the code will return as soon as the thermal system is exercised during a cycle. Samsung's recommended first step is running a full cycle with detergent rather than a simple power reset, which helps confirm whether the fault is persistent.