Samsung · Washer
Samsung Error Code 4C
Water supply error. The central control board has detected that water is not filling the tub fast enough or failing to fill entirely within the designated timeframe.
Safe DIY repairWhat the Samsung 4C code means
The 4C error code on a Samsung washing machine indicates a water supply error. This means the machine's central control board has detected that water is not filling the tub fast enough or failing to fill entirely within a designated timeframe.
Tools and supplies you'll need
Gather the following tools and supplies before you start so you don't have to stop mid-repair with the appliance partially disassembled.
- Slip-joint pliers
- small nylon cleaning brush
- vinegar or calcium-lime remover
- replacement water inlet valve
Comprehensive step-by-step troubleshooting & fixes
Follow each step in order. Before you begin, unplug the appliance from the wall outlet or flip the dedicated breaker so the unit is fully de-energized. Keep a towel and a shallow pan within reach in case any residual water escapes during the repair.
- 1
Verify Water Supply Valves
Before checking the machine, ensure that the household water supply valves on the wall behind your washer are completely turned on (counter-clockwise). If they are partially closed, water pressure drops, triggering the water-supply fault.
- 2
Clear the Mesh Inlet Filters (Most Common Fix)
- Power off and unplug the washing machine from the wall outlet.
- Turn off both the hot and cold water supply valves completely.
- Use your pliers to carefully unscrew the hot and cold hoses from the back of the washer.
- Locate the small plastic mesh screens inside the washer's inlet ports. Use pliers to gently pull them out.
- Soak the screens in warm water and vinegar to dissolve mineral build-up, scrub them clean, and reinsert them.
- 3
Inspect Hoses for Kinks or Restrictions
Pull the washer away from the wall slightly. Visually inspect the supply hoses. If a hose is bent, kinked, or crushed against the wall, it severely restricts water flow. Straighten the hoses and ensure there is at least 3 to 4 inches of clearance behind the machine.
Always disconnect the electrical power supply and turn off the water sources entirely before handling internal wiring or disconnecting components to prevent severe electrical shock or flooding.
Always disconnect power before servicing any appliance.
After the repair: how to verify the 4C code is gone
Once you've completed the repair, restore power to the Samsung washer and run a short test cycle — a quick rinse, drain, or self-diagnostic mode, depending on your model — to confirm the 4C fault has cleared. Watch the display for the first two to three minutes: if the code immediately reappears, the underlying component has not been fully resolved and you should recheck the part you serviced, inspect the wiring harness for a loose connector, or replace the related sensor. If the cycle completes normally and no fault is shown, your washer is safe to return to regular use. To prevent the 4C code from coming back, schedule a monthly check of debris filters, drain lines, door gaskets, and supply hoses — the vast majority of repeat-fault service calls trace back to gradual buildup that could have been cleared in five minutes.
Frequently asked questions about Samsung 4C
Is it safe to keep using my washer while 4C is showing?
No. The control board has paused the cycle specifically to prevent further damage. Continuing to run the appliance can compound the issue and turn an inexpensive DIY fix into a major repair.
Will resetting the appliance clear the 4C code?
A power-cycle reset (unplugging for 5–10 minutes) may silence the code temporarily, but if the underlying fault is still present the code will reappear on the next cycle. Always perform the diagnostic repair above rather than relying on a reset alone.
How much does a professional charge to fix this?
In most U.S. metros, a licensed appliance technician charges between $120 and $300 for a diagnosis-plus-repair visit on this type of fault, with the higher end reflecting parts replacement. If the steps above resolve the issue, you'll typically save the full service-call fee.