How to Fix 4E error — water supply issue on Samsung WF45T6000AW (Front Load)

4E error — water supply issue

This step-by-step repair guide walks you through fixing 4e error — water supply issue on your Samsung WF45T6000AW (Front Load). With the right tools and parts, most homeowners can complete this repair in 1–2 hours and avoid a costly service call.

Part of our Top 20 Washing machine Models & Common Repair Issues Guide. Browse all washing machine repair guides for related models and issues.

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Common Symptoms & Causes

The following symptoms typically appear when the Samsung WF45T6000AW is experiencing a water supply issue triggering the 4E error code.

The washer display shows the “4E” error code at the start of or during a wash cycle
The drum does not fill with water after the cycle begins
The washing machine pauses and beeps repeatedly without completing the fill phase
Water flow into the drum is noticeably slow or stops mid-fill

This error is most commonly caused by a kinked or closed water supply hose, clogged inlet valve screens, low household water pressure, or a faulty water inlet valve that has worn out over time.

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Safety First

Unplug the washing machine from the power outlet before starting any repair — never work on a live appliance.
Shut off the water supply valve before disconnecting any water lines or hoses.
Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
Take photos with your phone before disconnecting any wiring harnesses or connectors.
Work in a well-lit area with enough floor space to lay removed panels flat.

Tools & Parts Needed

Essential Tools

Phillips #2 screwdriver
¼” nut driver
Torx T20 screwdriver
Multimeter
Bucket and towels

Replacement Parts

Step-by-Step Repair Instructions

Step 1

Check that both the hot and cold water supply valves on the wall behind the washer are fully open by turning them counter-clockwise until they stop — a partially closed valve restricts flow enough to trigger the 4E error even if the machine and hoses are in perfect condition. Valves that haven’t been moved in years can stick or feel open when they’re not, so confirm each one is turned all the way. Pro tip: if a valve is stiff or only partially opens, replace it rather than forcing it, as old valves can fail in the half-open position.

Step 2

Inspect both inlet hoses along their entire length for kinks, sharp bends, or soft spots, because a kinked or internally collapsing hose cuts water flow just as effectively as a closed valve without showing obvious damage. Straighten any kinks and run the washer to see if the error clears; if a hose feels spongy or has been in service for many years, replace it — internal rubber deterioration isn’t visible from outside. Safety note: always shut off the supply valves before disconnecting hoses to avoid a sudden pressurized water release.

Step 3

Shut off the supply valves, disconnect both inlet hoses from the back of the washer (have towels ready for residual water), and inspect the small mesh inlet screens inside the washer’s water inlet ports — these screens catch sediment from the supply lines and will gradually block flow until fill is too slow for the machine to accept. Carefully pry the screens out with needle-nose pliers, rinse them under running water or scrub lightly with an old toothbrush, and reinstall or replace them if they’re torn. Damaged screens that are left out allow debris into the inlet valve solenoids, which causes a more expensive failure downstream.

Step 4

Test your household water pressure at the washer’s supply connection using an inexpensive inline gauge — Samsung specifies a minimum of 14.5 PSI for the WF45T6000AW to fill correctly, and pressure below that causes a slow fill that the machine interprets as a supply fault and codes as 4E. Low pressure that affects only the laundry area can point to a partially closed main shutoff or a pressure-reducing valve set too low, while house-wide low pressure is a plumbing infrastructure issue. Pro tip: test pressure when other fixtures are in use, since demand-drop below the threshold is enough to trigger the error intermittently.

Step 5

Unplug the washer before this step — you will be probing electrical components. Pull the unit away from the wall, remove the four quarter-inch hex screws securing the rear access panel, and locate the water inlet valve assembly; test each solenoid coil with a multimeter set to Rx1 by placing a probe on each terminal of the coil. A healthy coil reads between 120 and 500 ohms; an open reading (OL or infinite resistance) means that coil has failed and the entire inlet valve assembly must be replaced, as individual coils are not sold separately. A coil that reads near zero ohms is shorted and equally non-functional, so replace the valve in either case.

Step 6

Reattach both inlet hoses by hand until the fittings seat fully, then snug them with a wrench — no more than a quarter turn past hand-tight, because overtightening cracks the plastic inlet port fittings on the valve and creates a leak that isn’t immediately obvious. Restore power, select Quick Wash, and start the cycle while staying nearby to confirm the drum fills normally and the 4E error does not return. Pro tip: after the first fill cycle completes without error, check both hose connections at the wall and at the washer for drips, since fittings occasionally need a final small adjustment after the first pressurization.

Where to Buy Replacement Parts

Find genuine OEM and aftermarket replacement parts for your Samsung WF45T6000AW (Front Load) on Amazon:

When to Call a Professional

If the issue persists after completing all steps above, the problem may involve the sealed refrigerant system, a failed main control board, or wiring that requires specialized diagnostic equipment. Contact a licensed appliance technician — attempting sealed-system repairs without EPA 608 certification is illegal and unsafe.

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How Much Does This Repair Cost?

DIY repairs for a 4E error typically cost between $5–$50, covering parts like a new inlet valve or water supply hose. A professional service call for the same fix usually runs $150–$300 including labor. Tackling this repair yourself can save you over $100 while restoring your Samsung WF45T6000AW quickly.

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Frequently Asked Questions

How do I reset the 4E error on my Samsung WF45T6000AW after fixing the water supply?

Press and hold the Start/Pause button for about five seconds to reset the washer and clear the error code. If the 4E error returns, the underlying water supply issue has not been fully resolved.

Can a kinked inlet hose cause the 4E error on this front load washer?

Yes, a kinked or bent inlet hose restricts water flow enough to trigger the 4E error. Straighten the hose and ensure it has no tight bends behind the machine.

What water pressure does the Samsung WF45T6000AW require to function properly?

This model requires a minimum water pressure of 20 psi and a maximum of 116 psi. Low household water pressure is a common cause of the 4E error and should be checked at the supply valve.

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