A 4C code on a Samsung washer flags a problem with the water supply reaching the tub. The control board expects a certain amount of water within a set time window during fill, and when that water does not show up, it stops the cycle and displays the code rather than letting the machine run dry.
Most Common Causes
- A shutoff valve behind the washer that is only partially open, or was bumped closed during cleaning
- A kinked, frozen, or crushed inlet hose, especially on machines installed close to a wall
- A clogged inlet filter screen where the hose connects to the washer — sediment and mineral buildup collect here over time
- Low household water pressure feeding the laundry connection
What You Can Check Yourself
Start at the shutoff valves and turn each one fully counter-clockwise until it stops. Disconnect the hoses at the back of the washer and look inside the connection ports for the small mesh screens; if they’re caked with grit, rinse them under a faucet with an old toothbrush. Straighten any hose that’s pinched behind the cabinet and confirm both hot and cold lines are actually feeding water when opened over a bucket.
If the screens are clean, the valves are fully open, and you still see 4C, the issue is more likely a failing water inlet valve on the machine itself or a wiring failure at the control board — both are internal repairs.
When to Call a Technician
If the code returns after you’ve confirmed water flow at the wall and cleared the filter screens, it’s time to bring in a technician who can test the inlet valve solenoids and the board directly rather than guessing at parts. Our Samsung washer repair team diagnoses 4C on-site and can usually confirm the failed component in one visit; see our washer repair or replace guide if the unit is older and you’re weighing your options.
This is an independent repair service and is not affiliated with Samsung.
