Samsung Dishwasher Error Code 4C – Water Supply Problem & Fix
Samsung dishwasher error code 4C means a water supply issue. Learn what causes it, how to fix it step by step, and when to call for service.
DISHWASHER ERROR
1/25/20262 min read
What Does Samsung Dishwasher Error Code 4C Mean?
The 4C error code means the dishwasher is not receiving enough water or no water at all. The control system expects water to enter within a specific time. When it doesn’t, the dishwasher shuts down and shows 4C to prevent damage.
Most Common Reasons (Ranked by Frequency)
Water supply tap is closed or partially open
Low water pressure in the home
Kinked or bent inlet hose
Clogged inlet filter screen
Faulty water inlet valve
Control board sensing error (rare)
Step-by-Step Fix (Follow in Order)
Step 1: Check the Water Tap
Locate the dishwasher water supply valve.
Make sure it is fully open.
Test by running the sink—water flow should be strong.
✅ This alone fixes many 4C errors.
Step 2: Inspect the Inlet Hose
Pull the dishwasher slightly forward.
Look for kinks, bends, or crushing.
Straighten the hose completely.
Step 3: Clean the Inlet Filter Screen
Turn off the water supply.
Disconnect the inlet hose.
Remove the small mesh filter inside the valve.
Rinse it under running water.
🧼 Sediment and rust often block this screen.
Step 4: Check Home Water Pressure
Samsung dishwashers need adequate pressure to operate.
If pressure is low, the 4C error may appear intermittently.
Try running the dishwasher when other taps are off.
Step 5: Power Reset the Dishwasher
Turn off the unit.
Unplug or switch off the circuit breaker.
Wait 10 minutes.
Restore power and start a cycle.
If the Error Still Appears
The problem may be internal:
Defective water inlet valve
Damaged wiring to the valve
Faulty main control board
At this point, professional service is recommended.
Quick FAQs
Can I use the dishwasher with 4C error?
No. The dishwasher will not run until water supply is restored.
Is 4C the same as 4E?
Yes. 4C replaced 4E on many newer Samsung models. Both indicate a water supply issue.
Can hard water cause 4C?
Yes. Mineral buildup can clog the inlet filter over time.
The Samsung dishwasher error code 4C is almost always caused by a water supply problem, not a major failure. In most cases, opening the valve, fixing the hose, or cleaning the inlet filter solves it quickly. Regular maintenance helps prevent it from coming back.
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