Samsung identifies 4C and 4E as a dishwasher water-supply error: incoming water does not meet the pressure or temperature expected.
What 4C / 4E means
Samsung identifies 4C and 4E as a dishwasher water-supply error: incoming water does not meet the pressure or temperature expected.
What you may notice
- The cycle stops or will not start
- The display shows 4C / 4E
- The dishwasher may beep
- The code returns after Cancel
Most likely causes
- 01The supply valve is closed
- 02The inlet hose is kinked
- 03Household pressure is low
- 04The inlet screen is restricted
- 05The inlet valve needs service
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.
Open the supply valve
Confirm the dishwasher water valve is fully open.
Inspect the hose
Check accessible sections for kinks or crushing.
Check other fixtures
Confirm the home has normal water pressure.
Restart once
After correcting the supply, disconnect power for 30 seconds and retry.
Know where to stop
Turn off water and power before loosening any connection. Stop if a fitting leaks.
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.