Samsung Dishwasher Error Code 4C
Water supply error — dishwasher not filling
The dishwasher opened its inlet valve but didn't detect water arriving within the fill window. The cycle pauses with 4C (4E on older displays). Almost always a supply problem — a closed valve, low pressure, or a clogged inlet screen — rather than a failed part inside the machine.
What Does Error Code 4C Mean on a Samsung Dishwasher?
Water supply error — dishwasher not filling.
The dishwasher opened its inlet valve but didn't detect water arriving within the fill window. The cycle pauses with 4C (4E on older displays). Almost always a supply problem — a closed valve, low pressure, or a clogged inlet screen — rather than a failed part inside the machine.
What Causes Error Code 4C?
Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:
- 1 Supply valve under the sink closed or partially open 40% of cases
- 2 Clogged inlet screen at the valve 25% of cases
- 3 Kinked supply line 20% of cases
- 4 Failed water inlet valve 15% of cases
How to Fix Samsung Dishwasher Error Code 4C
- 1
Open the supply valve fully
Check the shutoff under the sink — it should be fully counterclockwise. Half-open valves drop pressure below the fill threshold.
- 2
Check water pressure
The dishwasher needs roughly 20 psi minimum. If the kitchen faucet runs weak too, the problem is upstream.
- 3
Clean the inlet screen
Shut the supply, disconnect the fill line at the dishwasher's inlet valve, and clean the small mesh screen of scale and grit.
⚠️ Put a towel down — the line holds water. - 4
Replace the inlet valve
If supply and screen are good but no water enters, swap the inlet valve (front lower panel, two wires and two connections).
🔩 Samsung dishwasher inlet valve ($25–$60)⚠️ Switch off the breaker before opening the panel.
How to Reset Error Code 4C
Restore the water supply, then switch the breaker off for 60 seconds and run a short cycle to confirm filling.
Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.
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Thanks for letting us know. If the steps above didn't work, see when to call a professional.
When to Call a Professional
If water pressure and the valve check out but 4C persists, the flow sensor or control board needs professional testing.
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Frequently Asked Questions
What does error code 4C mean on a Samsung Dishwasher? +
How do I fix error code 4C on my Samsung Dishwasher? +
How do I clear or reset error code 4C? +
Is error code 4C serious? +
Sources & References
- • Samsung Support — Error Codes — official manufacturer documentation
- • Our editorial & verification policy
Content verified against manufacturer service documentation. Last verified: June 11, 2026.