4C — / 4E — Water Supply Error
The 4C (and older 4E) code means the washer is not getting water at the expected rate during the fill step. The control board cannot reach the target level.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Typical cost
- $25-50
- Verified against
- samsung.com ↗
The fix
Water inlet valve assembly
Water supply error - washer not filling properly
Diagnose first: Usually clogged inlet screens from sediment, or failed solenoid in the inlet valve. Clean screens every 6-12 months in hard water areas.
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How to fix it
- Confirm both supply faucets are fully open.
- Turn off the water, remove the fill hoses, and clean the mesh filter screens.
- Straighten any kinks in the hoses.
- If fill is still poor, test and replace the inlet valve.
Why it happens
Typical signs: Washer will not fill or fills slowly · Cycle stalls at the start · 4C or 4E on the display
- Supply valves not fully open The hot/cold faucets behind the washer must be open all the way.
- Clogged inlet mesh filters Debris screens where the hoses meet the valve clog over time.
- Kinked fill hoses A pinched supply hose restricts flow.
- Faulty water inlet valve A valve that will not open electrically.
Related repair guides
More Samsung washer codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.