Warning: Disconnect power before servicing.
ErrBase

Samsung Dishwasher 4C Error Code: Water Supply Fault

Quick Answer

Samsung 4C error code means the dishwasher cannot draw water. The most common cause is a closed or kinked supply valve under the sink, followed by clogged inlet valve screens and a failed solenoid. The inlet valve solenoid should measure 600 to 1200 ohms on a multimeter.

Samsung 4C error code means the dishwasher cannot draw water. The most common cause is a closed or kinked supply valve under the sink, followed by clogged inlet valve screens and a failed solenoid. The inlet valve solenoid should measure 600 to 1200 ohms on a multimeter. Start with the supply valve before touching any parts.

SamsungDishwasherSeverity: moderate90% DIY Success
Time to Fix
15–45 min
Difficulty
beginner
Parts Cost
$25 – $42
Tools Needed
Multimeter, Pliers

What Does the 4C Code Mean?

4C fires when the fill cycle times out without enough water entering the tub. Samsung's fill window is about 3 to 5 minutes. If water pressure drops or the inlet valve screens are clogged with mineral deposits, the machine never reaches the target level and throws 4C.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Water supply shut-off valve under sink is closed or partially closed40%
Inlet valve mesh screens clogged with sediment or mineral buildup24%
Inlet valve solenoid failed open or shorted14%
Wiring harness to inlet valve damaged or disconnected12%
Supply hose kinked behind the machine10%

Symptoms You May Notice

  • 4C code appears at the start of a fill cycle
  • Machine is completely silent after pressing Start - no water sound
  • Cycle runs for a few minutes then stops with 4C
  • Dishes came out dry and dirty after 4C appeared mid-cycle

Can you reset a Samsung dishwasher to clear the 4C code?

Hold Start/Cancel for 3 seconds to clear the 4C code after fixing the water supply issue. If the supply was simply closed, opening the valve and restarting is sufficient.

Tools Required for Diagnosis

MultimeterPliersTowels

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Open the cabinet under the sink and locate the dishwasher supply

Open the cabinet under the sink and locate the dishwasher supply shut-off valve. Confirm it is fully open (handle parallel to pipe).

2

Inspect the supply hose from the valve to the dishwasher for

3

Turn off supply valve

4

Set multimeter to ohms

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
Water Inlet ValveDD62-00136A · $25–$42

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $34 (Parts) vs $725 (New Machine)

Frequently Asked Questions

What does 4C mean on a Samsung dishwasher?
4C means the dishwasher started its fill cycle but did not detect adequate water flow within the timeout window. The most common fix is opening the supply valve or cleaning the inlet valve screens.
How do I clean Samsung dishwasher inlet valve screens?
Turn off the supply valve, disconnect the hose at the back of the machine near the bottom, and pull out the two small mesh screens from inside the valve port with needle-nose pliers. Rinse under water and reinsert.
Can low water pressure cause a 4C error?
Yes. Samsung dishwashers require a minimum of 20 PSI to fill correctly. If household pressure is low or multiple fixtures are running simultaneously, 4C can appear. Test by running the dishwasher when no other appliances are using water.

Related Samsung Dishwasher Error Codes

Code: OCSamsung Dishwasher OC Error Code: Overfill DetectedCode: 9ESamsung Dishwasher 9E Error Code: Water Level Sensor Fault

Same Fix Works on These Brands

Samsung shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

Samsung washerSamsung Washer 3C2 Error Code: Motor StallSamsung washerSamsung Washer 3E Error Code: Motor FaultSamsung washerSamsung Washer 4C Error Code: No Water SupplySamsung washerSamsung Washer 4E Error Code: Water Supply Fault (Top Load)Samsung washerSamsung Washer 5C Error Code: Drain Error (Older Display)Samsung washerSamsung Washer 8C Error Code: Vibration Sensor Fault

Models Known to Experience 4C Errors

This repair applies to most Samsung dishwashers with this error code. Common model numbers include:

DW80R9950US, DW80R2031US, DW80T5040US, DW80K5050US, DW80N6070US, DW80M9550US

Last verified for technical accuracy on March 14, 2026