Samsung Dishwasher Error Code HE

What the HE Error Means on a Samsung Dishwasher

The HE error code on a Samsung dishwasher indicates a heating-related fault — commonly a problem with the dishwasher’s heating element, temperature sensor (NTC thermistor), heater relay, or the control board that manages heating. When the appliance cannot reach or correctly monitor the required water or air temperature, the control board flags the condition as HE. This can result in incomplete cycles, longer drying times, poor sanitation, spotty cleaning, or the dishwasher refusing to run certain cycles. In some cases the dishwasher may continue to run but will not heat, causing dishes to remain wet and preventing high-temperature sanitizing cycles. Because heating components are electrical and can overheat, there is also a potential safety risk if wiring is damaged or a short occurs — so proceed cautiously and disconnect power before any inspection.

Common Causes

• Failed heating element (open or shorted)
• Faulty NTC temperature sensor / thermistor (incorrect temperature readings)
• Defective main control board or heater relay
• Loose, corroded, or damaged wiring/connectors to the heater or sensor
• Blown thermal fuse or high-limit thermostat
• Software/firmware glitch or transient electrical fault
• Manufacturing defect or failed component in specific models

Troubleshooting Steps

1. Power off & safety first: Unplug the dishwasher or turn off the circuit breaker before any inspection to avoid electric shock.
2. Clear & reset: Reset the dishwasher to clear transient errors — either unplug for 1–2 minutes or turn off the breaker, then restore power and run a short cycle to see if HE returns.
3. Run diagnostic/self-test: Many Samsung dishwashers have a diagnostic/service mode that displays error logs. Consult your manual for steps to enter diagnostics and check if HE or related codes appear.
4. Inspect visible wiring & connectors: Remove the access panel and visually inspect wiring around the heater and sensor for burn marks, melted insulation, or loose connectors.
5. Check the heating element: Visually inspect for breaks or corrosion. Use a multimeter to test continuity (typical resistance values vary by model — consult service manual). No continuity usually indicates a failed element.
6. Test the NTC thermistor (temperature sensor): Measure resistance at room temperature and compare with the specification. A wildly off reading or infinite/open circuit indicates a bad sensor.
7. Test the heater relay and control board outputs: With power on (and caution), check whether the board is supplying voltage to the heater during a heating cycle. If the board never energizes the heater, the control board or relay may be defective.
8. Check thermal fuses/limiters: Some models include a high-limit thermostat or thermal fuse that opens when overheated — test for continuity and replace if open.
9. Replace suspect parts: If testing points to a bad heater, sensor, or thermal fuse, replace the part with OEM or approved replacement parts. Re-run diagnostics after replacement.
10. If uncertain or unsafe — call a professional: If you cannot isolate the fault safely, or if control board replacement or complex electrical testing is required, contact an authorized Samsung technician or licensed appliance repair service.

Maintenance / Prevention Tips

• Run hot water at the kitchen sink before starting the dishwasher so the machine begins with hot water.
• Use recommended dishwasher detergents and rinse aids — buildup can affect sensors and heating performance.
• Clean filters and spray arms regularly to prevent overloads and repeated hard cycles.
• Inspect the lower access panel occasionally for signs of corrosion or leaks around the heater area.
• Keep the dishwasher’s plug and power cord in good condition and ensure a secure wall outlet connection.
• Avoid using harsh chemical cleaners inside the tub that can corrode wiring or components.
• Schedule periodic professional maintenance if you run the dishwasher heavily (commercial or large household use).
• Replace worn or frayed wiring harnesses promptly — don’t let damaged insulation remain in place.
• Use the proper cycle for load types; repeated high-heat cycles can stress heating components over time.
• Allow proper ventilation around the dishwasher and avoid stacking items that trap heat near the control area.
• Address any water leaks immediately — moisture can corrode electrical parts that lead to heating faults.
• If you live in a hard-water area, use a water softener or descaling regimen periodically to reduce mineral buildup on the heater.

FAQs

Conclusion / Safety Notice

Addressing an HE error often involves working with electrical components. For your safety, always disconnect power before attempting inspections or repairs. If troubleshooting points to a failed control board, damaged wiring, or you are uncomfortable performing electrical tests, contact a licensed appliance technician or Samsung-authorized service. Professional technicians have the tools and training to diagnose heating circuits and replace components safely.

In summary, the HE code usually signals a heating circuit or temperature-sensing issue that affects drying, sanitizing, and cycle completion. Minor issues can sometimes be resolved with a reset or sensor replacement, but electrical faults and control board problems should be handled by professionals. When in doubt, stop using the appliance and seek qualified service to protect your home and family.