Samsung Dishwasher HC Error Code — What It Means
The HC code (shown as 1E or IE on some rotary models) is a high-temperature heater fault. The control sees water or the heater running hotter than the safe range and shuts the unit down.
This usually points to a heating element relay stuck closed or a temperature sensor that is feeding the board a bad reading, so the heater never gets told to switch off.
Common Causes
- Heating element relay stuck closed A relay welded shut keeps the heater powered and drives the temperature too high.
- Failing thermistor A drifting temperature sensor under-reads heat so the board keeps the heater on too long.
- Scale on the temperature sensor Calcium buildup wraps the sensor and blocks an accurate temperature read.
- Shorted heating element An element with a short can heat without proper control and overshoot the limit.
- Wiring or connector fault Loose or burnt connections at the heater or sensor cause false high readings.
- Control board fault A failed board can hold heater power on regardless of the sensor signal.
Step-by-Step Fix
- Turn off the dishwasher and disconnect power before opening any panels.
- Remove the lower access panel and inspect the heating element and thermistor wiring for burns or looseness.
- Check the temperature sensor for heavy scale and clean it gently if it is coated.
- Use a multimeter to test the thermistor resistance and confirm it changes with temperature.
- Test the heating element for a short to the tub or a reading far outside its rated range.
- Reconnect any loose plugs, restore power, and run a short cycle to see if HC returns.
- If the thermistor or element tests bad, replace the failed part and retest before closing up.
Parts Often Needed
| Part | Notes |
|---|---|
| Samsung dishwasher heating element | Amazon | Match the element to your model, since shape and terminal layout vary. |
| Dishwasher thermistor or temperature sensor | Amazon | Replace a sensor that reads out of range or is heavily scaled. |
| Heater wiring harness | Amazon | Only if the connectors at the heater are burnt or melted. |
When to Call a Pro
If the element and thermistor both test good but HC keeps returning, the relay on the control board is the likely culprit. Board-level heater relays are not a safe DIY repair, so a technician should confirm and replace the board.