DIY Error Codes

Samsung dishwasher error 4C

Water supply check

Open the water supply valve and confirm the house water is on. If 4C continues, close the valve and call Samsung service.

Switch off power at the breaker before servicing. Don't repair internal parts yourself.
Why
Samsung (p.5): "Disconnect the power cable (or set the circuit breaker to off) before servicing your dishwasher." "Do not repair, replace, or service any part of your dishwasher yourself. Disassembly, repairs and modifications must be performed by authorized service technicians only."

Fix it step by step

Step 1 of 4

  1. Check the supply valve

    • 2 min
    • None
    • DIY

    Is it closed?

    Why & details

    Check the supply valve.

    Samsung chart, 4C (p.30): "Check if the water supply valve is closed".

    Did the code clear?

  2. Check the house water supply

    • 2 min
    • None
    • DIY

    Is the water supply suspended?

    Why & details

    Check the house water supply.

    Samsung chart, 4C (p.30): "the water supply is suspended". Try another tap in the house.

    Did the code clear?

  3. Frozen or clogged line

    • Varies
    • None
    • Caution

    Samsung lists a frozen or clogged inlet valve or line.

    Why & details

    Frozen or clogged line.

    Samsung chart, 4C (p.30): "the water inlet valve or line is frozen or clogged by foreign particles." Samsung says not to repair, replace or service any part of the dishwasher yourself (p.5).

  4. Close the valve and call service

    • Decision
    • None
    • Pro decision

    If 4C continues.

    Why & details

    Close the valve and call service.

    Samsung chart, 4C (p.30): "If the problem continues, close the water supply valve, and then contact an authorized Samsung service center."

    Still showing 4C?Need a pro → call a pro

Code cleared. Nice work.

Watch the display for a day to make sure it stays clear.

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Fixed after any step? Watch the display for a day to make sure it stays clear. Still 4C after step 4? call a pro.

What 4C means

The dishwasher is not getting water. Samsung lists a closed valve, a supply cut-off, or a frozen or clogged inlet valve or line.

More detail
Samsung's Information Codes chart (p.30) lists 4C as "Water supply check": "Check if the water supply valve is closed, the water supply is suspended, or the water inlet valve or line is frozen or clogged by foreign particles."

5-minute checks

Full answer & models

Samsung dishwasher 4C is a water supply check. Make sure the supply valve is open and the water supply is on, and that the inlet line is not frozen or clogged.

Applies to: DW80K7050 SeriesDW80K5050 Series
Also searched as: Samsung dishwasher 4C, Samsung dishwasher 4C code, Samsung dishwasher error code 4C, Samsung dishwasher not filling code

Call a pro if…

  • 4C continues with the valve open and house water on (Samsung: close the valve, authorized service).
  • The inlet valve or line is frozen or clogged.
  • There is any leak at the supply connection.

FAQ

What does 4C mean on a Samsung dishwasher?

Water supply check. Samsung lists a closed supply valve, a suspended water supply, or a frozen or clogged inlet valve or line.

What should I do if 4C stays on?

Samsung says to close the water supply valve and contact an authorized Samsung service center.

Can I replace the inlet valve myself?

Samsung says not to repair, replace or service any part of the dishwasher yourself.

Source: Samsung Dishwasher User Manual DW80K7050/DW80K5050 Series (DW7000KM): Information Codes p.30, Safety Information p.5. Written by the DIY Error Codes team. Updated 2026-10-17. DIY Error Codes is independent and not affiliated with or endorsed by Samsung.