What 4C Means
4C is the water-supply code on Samsung’s WD90F53AVS/US Laundry Combo service manual: the combo is not receiving water properly.
Common Causes of 4C
- Water supply faucet not fully open
- Water supply hose kinked
- Low household water pressure
🔧 One Safe Check You Can Try
Check that both faucets supplying the machine are turned on fully, then tap Start to restart. If 4C continues, turn the Laundry Combo off, wait two to three minutes, and turn it back on before trying again.
⚠ Why You Shouldn't Go Further Than That
- If both faucets are open and 4C still will not clear, the inlet valve needs a technician’s test.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.