What does Samsung Dishwasher 4C Error Code - Causes & Fix mean?

4C means the dishwasher cannot fill with enough water in time. Most fixes start by opening the supply valve and cleaning the inlet screen.

How do I fix Samsung Dishwasher 4C Error Code - Causes & Fix?

Follow the step-by-step diagnosis below. The most likely fix is identified by checking power, sensor resistance, and control-board signals in order — using a multimeter and the part numbers documented in the parts reference table.

Can I keep running the equipment with this fault active?

Generally no. Faults on Appliance units are emitted when a sensor, safety, or control circuit is outside its operating envelope. Running through an active fault risks compressor, heater, or control-board damage. Diagnose and clear the fault first.

What part is most commonly replaced for Samsung Dishwasher 4C Error Code - Causes & Fix?

The most frequently replaced parts for Samsung Dishwasher 4C Error Code - Causes & Fix are listed in the Parts Reference section of this guide with OEM part numbers and typical price ranges. Check the table for direct replacements.

Is Samsung Dishwasher 4C Error Code - Causes & Fix a DIY repair or do I need a technician?

Sensor swaps, fan motor replacements, and condenser cleaning are typical DIY-level repairs. Anything involving refrigerant, gas, or high-voltage (>240V) work requires a licensed technician for both safety and code-compliance reasons.

Samsung Dishwasher 4C Error Code - Causes & Fix

Samsung Dishwasher 4C Error Code — What It Means

The 4C code (shown as 4E on older units) is a water supply fault. The control board times the fill, and if the tub does not reach the target level fast enough it stops and posts 4C.

In most homes this is a flow problem at the supply, the hose, or the inlet valve rather than a failed control board.

Jump to Fix

Common Causes

Supply valve partly closed The shutoff valve under the sink is not fully open, so flow is too low to fill in time.
Clogged inlet screen Sediment builds up on the inlet valve screen and chokes the water flow into the tub.
Kinked or crushed fill hose A bent or pinched supply hose behind the unit restricts water and trips the timer.
Auto-shutoff or FloodSafe hose Safety hoses can throttle flow or trip closed and create a false 4C reading.
Failed water inlet valve A weak or stuck inlet valve solenoid does not open enough to fill the tub on schedule.
Low household water pressure A pressure drop from other fixtures or a main issue starves the fill cycle.

Step-by-Step Fix

Turn off the dishwasher and confirm the under-sink supply valve is fully open with the handle in line with the pipe.
Pull the unit out and check the fill hose behind it for kinks, bends, or crush points.
Shut off water, disconnect the fill hose, and clean the inlet valve screen under running water.
Soak a scaled screen in white vinegar for about 15 minutes to clear mineral buildup, then refit it.
If a FloodSafe or auto-shutoff hose is fitted, swap in a standard supply hose and retest.
Run a cycle and watch the fill. If it still posts 4C with good supply, replace the water inlet valve.
Reset by holding Start or Cancel for about 3 seconds before the next test cycle.

Parts Often Needed

Part	Notes
Samsung dishwasher water inlet valve	Amazon \| Match the valve to your exact model number, since the body and coil vary by series.
Dishwasher fill hose	Amazon \| Standard braided supply hose to replace a kinked or auto-shutoff hose.
Inlet valve screen or filter	Amazon \| Only needed if your model uses a serviceable separate screen.

When to Call a Pro

If the supply valve is open, the hose is clear, and a new inlet valve does not clear the code, the fault may sit in the wiring harness or control board. At that point a technician can meter the valve and board to confirm the failed part before you spend more on guesses.