4E Water supply error - not filling

moderate

The Samsung 4E error code on your dishwasher indicates: Water supply error - not filling. This typically requires troubleshooting the water supply system.

Samsung Dishwasher Affects 3 models

What Causes Error 4E

high likelihood #1

Water supply valve turned off or low pressure

The household water supply to the appliance is restricted or completely off.

high likelihood #2

Water inlet valve failure

The electric solenoid valve that lets water into the appliance has failed or is clogged with sediment.

medium likelihood #3

Kinked or frozen supply line

The water line running to the appliance is bent, blocked, or frozen (in the case of refrigerators).

medium likelihood #4

Water filter clogged

A dirty filter is restricting water flow below the minimum threshold.

low likelihood #5

Float switch or pressure sensor fault

The sensor that detects water level is stuck or malfunctioning.

How to Fix Error 4E

  1. Step 1: Check the water supply valve

    Find the shut-off valve (usually under the sink or behind the appliance). Make sure it's fully open — turn it counterclockwise all the way.

  2. Step 2: Inspect the supply line

    Follow the water line from the valve to the appliance. Look for kinks, pinches, or ice (for fridges). Straighten any bends.

  3. Step 3: Replace the water filter

    If your appliance has a water filter, replace it. Filters should be changed every 6 months. A clogged filter restricts flow enough to trigger this error.

  4. Step 4: Check water pressure

    The appliance typically needs at least 20 PSI. If other faucets in your home have low flow, the issue is your household water pressure, not the appliance.

  5. Step 5: Test the water inlet valve

    With the appliance unplugged, disconnect the water line from the inlet valve. Turn the water on briefly into a bucket — if flow is strong, the valve itself may be bad. Test the valve solenoid for continuity (should read 200-1500 ohms).

    ⚠️ Have towels ready — water will flow when you disconnect the line.

  6. Step 6: Replace the inlet valve

    If the valve tests bad or is visibly clogged with mineral deposits, replace it. They're typically held by 2 screws and one wire connector.

Parts You Might Need

If troubleshooting doesn't resolve error 4E, you may need to replace one of these parts:

Water Inlet Valve

valve $20-$55
Find on Amazon PartSelect

Float Switch

sensor $10-$30
Find on Amazon PartSelect

Supply Line Hose

hose $10-$20
Find on Amazon PartSelect

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When to Call a Professional

If household water pressure is the issue, or if the inlet valve location is difficult to access on your model

  • Low household water pressure may require a plumber
  • Some inlet valves are buried deep in the appliance frame
  • Persistent water supply issues can indicate frozen lines inside walls

Video Repair Guides

Watch a repair walkthrough for this error code on YouTube:

▶ Search YouTube for "Samsung dishwasher error 4E fix"

Models Affected

This error code has been reported on the following Samsung dishwasher models:

DW80R5060USDW80R9950USDW80K5050US