Samsung identifies HC as a high-temperature heater error: the measured temperature inside the dishwasher is too high.
What HC means
Samsung identifies HC as a high-temperature heater error: the measured temperature inside the dishwasher is too high.
What you may notice
- The cycle stops or will not start
- The display shows HC
- The dishwasher may beep
- The code returns after Cancel
Most likely causes
- 01A temporary control issue
- 02A heater relay problem
- 03Incorrect temperature sensing
- 04An internal heating fault
Safe checks, in order
Start with the simplest non-invasive check. Stop as soon as the error clears; repeated resets can hide a condition without correcting it.
Switch off power
Turn the dishwasher circuit off for 30 seconds.
Empty the dishwasher
Remove dishes and confirm no plastic item has contacted the heater area.
Run the approved test
Restore power, add detergent, and run one empty Normal cycle as Samsung directs.
Know where to stop
Do not open panels or test heating circuits. Let hot water and interior surfaces cool.
When to call a technician or support
Request Samsung service if the code returns after the safe checks above or if leaking, overheating, electrical odor, or abnormal mechanical noise is present.
When you call, have the exact product or vehicle model, model year where relevant, the complete code or symbol, and when it appeared.
Where this information came from
We use the manufacturer's current published guidance as the starting point, then organize it into a safer, beginner-friendly sequence.
Samsung Support — dishwasher error codes Source last checked August 16, 2026. Manufacturer instructions and model manuals take priority over this independent summary.