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Samsung Dishwasher Not Filling With Water: 4C Error and Inlet Valve Fix

Quick Answer

Samsung dishwasher not filling displays the 4C error code. Check that both water supply valves under the sink are fully open (turn counterclockwise). Then check the small mesh filter screens inside the inlet valve ports at the back of the dishwasher for mineral deposits. Samsung WaterWall models require a minimum 20 PSI water pressure to operate.

Samsung dishwasher not filling displays the 4C error code (water supply issue). Samsung's specific feature: the WaterWall models have a water pressure sensor that requires minimum 20 PSI to operate. If your home water pressure is low (common in older neighborhoods or when multiple fixtures run simultaneously), the Samsung may show 4C even though water is technically available. Check water pressure with a gauge at the supply valve. Beyond pressure: Samsung dishwashers have a dual solenoid inlet valve - one solenoid for hot water, one for the water wall spray. If one solenoid fails, the dishwasher may partially fill but not enough for a full cycle.

SamsungDishwasherSeverity: mediumDifficulty: intermediate75% DIY Success
Time to Fix
15–90 min
Difficulty
intermediate
Parts Cost
—
Tools Needed
Multimeter, Screwdriver

What Does the NOT-FILLING Code Mean?

Samsung dishwasher not filling: 4C error code.

Most Likely Causes

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

Component failure in the Samsung dishwasher40%
Sensor or thermostat out of operating range24%
Control board fault14%
Power or electrical supply issue12%
Mechanical wear requiring inspection10%

Symptoms You May Notice

  • Appliance exhibits not filling behavior

Can you reset a Samsung dishwasher to clear the NOT-FILLING code?

Unplug 60 seconds. Plug in and test.

Tools Required for Diagnosis

MultimeterScrewdriverFlashlight

Diagnostic Checklist

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

1

Follow the brand-specific diagnosis in the guide above.

Follow the brand-specific diagnosis in the guide above.

2

Check for error codes on display or LED patterns.

3

Run manufacturer diagnostic mode if available.

Frequently Asked Questions

How much does Samsung dishwasher repair cost?
Most repairs $100-400 depending on the component.
Worth repairing or replacing?
If under 10 years and repair under 50% of replacement cost, repair.
DIY or professional?
Many fixes are DIY. Gas and sealed systems need professionals.

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

Last verified for technical accuracy on March 15, 2026