Samsung Dishwasher Error Code HE1

HE1 on a Samsung dishwasher indicates a high temperature heating error. The control system has detected water temperature above 176°F (80°C) sustained for more than 3 seconds during operation. This triggers a fault to protect the appliance from damage caused by uncontrolled overheating. The most likely sources are a shorted heater relay on the Main PBA or a faulty thermistor.

You should not continue running the dishwasher while HE1 is active. The error indicates a condition where water temperature may be climbing beyond safe limits, which can damage the tub, dish racks, and internal components. Continuing to operate the appliance could also pose a broader electrical risk if a relay is shorted on the control board.

Repair costs depend on which component has failed. Thermistor replacement is generally the least expensive fix, typically in the range of $50 to $150 for parts and labor. Main PBA replacement is more costly, often ranging from $150 to $350 or more depending on the specific board and labor rates in your area. Getting a diagnostic appointment can help confirm which part needs to be replaced before committing to a repair cost.

Some steps are accessible to a knowledgeable DIYer, such as inspecting wiring connectors to the thermistor and checking for visible damage on the control board. However, properly testing thermistor resistance and diagnosing a shorted relay requires a multimeter and some electrical knowledge. Replacing the Main PBA is a more advanced repair that many homeowners prefer to leave to a technician.

Resetting the dishwasher may temporarily clear the HE1 code, but the error will almost certainly return if the underlying fault, such as a shorted relay or failed thermistor, has not been corrected. A reset is useful for confirming whether the code reappears and under what conditions, but it is not a fix for the root cause.