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ErrBase

Samsung Dishwasher 4E Error Code: Water Supply Fix

Quick Answer

A 4E error means your dishwasher is not getting water. Nine times out of ten, this is caused by a closed supply valve, a kinked inlet hose, or a clogged mesh filter inside the water inlet valve. Check your home water supply first before replacing any parts.

Ignore a 4E long enough and your dishwasher just sits there while dirty dishes pile up on your counter. Worse, people assume it's a board issue and spend $200 on a part they don't need. I've seen this code on probably 40-50 Samsung dishwashers and honestly, 80% of the time it's something you can fix yourself in under 20 minutes with zero parts.

SamsungDishwasherSeverity: moderate92% DIY Success
Time to Fix
15–45 min
Difficulty
beginner
Parts Cost
—
Tools Needed
Phillips #2 screwdriver, Needle-nose pliers

What Does the 4E Code Mean?

OK so here's the deal with the 4E: your dishwasher tried to fill with water and basically got nothing. Could be a simple closed valve, a kinked hose, or a clogged filter screen that's roughly the size of a quarter. Hard water is brutal on these mesh screens, so if you're on well water or live somewhere with heavy mineral deposits, that filter gets gunked up way faster than you'd expect.

Most Likely Causes

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

Kinked or pinched hose35%
Clogged inlet filter30%
Faulty inlet valve20%
Low water pressure10%
Wiring or sensor failure5%

Symptoms You May Notice

  • The dishwasher starts its cycle, you hear a click from the valve, maybe a short hiss, and then silence. No water sound at all. Then the 4E pops up on the display about 60-90 seconds in.
  • Cycle stops dead in the middle of a wash with standing water in the tub or no water at all, error blinking at you.
  • You can hear the wash arm trying to spray but it sounds weak and intermittent, like someone's barely trickling water through it.
  • Dishwasher fills super slowly and then errors out before reaching the minimum level the sensor needs.
  • Error shows up randomly, clears itself after a reset, then comes back a few cycles later. That pattern usually points to the flow sensor flaking out rather than a straight blockage.

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

To clear the 4E error after a repair, press and hold the Start button for three seconds to cancel the current cycle and drain any residual water. If the display remains frozen, disconnect the unit from power at the breaker for one minute to reboot the main control assembly.

Tools Required for Diagnosis

Phillips #2 screwdriverNeedle-nose pliersAdjustable wrench or 3/4-inch open-end wrenchMultimeterTowels or a shallow pan to catch dripsFlashlight

Diagnostic Checklist

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

ComponentComponent Under Test
Expected Range200–500 ohms
ConditionIf Open (OL) or infinite, replace component.

Frequently Asked Questions

What's the difference between 4E and 4C on Samsung dishwashers?
Same error, different display. Samsung switched from 4E to 4C on newer models somewhere around 2015-2016. Older unit? You'll see 4E. Newer digital display? It shows 4C. The fix is completely identical for both codes. Don't let that confuse you or make you think you've got a different problem going on.
Can I bypass the 4E error by adding water manually?
Don't bother. I've had people tell me they pour a couple gallons in and it runs for a while. Maybe. But a dishwasher fills and drains multiple times in a single cycle, so if the inlet valve isn't working or flow is restricted, it's just going to throw the code again on the first rinse. You're not fixing anything, just delaying it. Figure out the actual cause because it's almost always something simple and cheap.
How do I reset my Samsung dishwasher after fixing the 4E issue?
Press and hold the Start/Cancel button for about 3 seconds to cancel the current cycle. The machine will drain whatever's in it. Then go flip the dishwasher breaker off at your panel for a full 60 seconds. Come back, flip it on, and start a new cycle. If the 4E comes back right away, you haven't fully solved the water supply problem yet. If it runs through the fill stage without erroring, you're good.
Why does my dishwasher start filling and then show 4E partway through?
That's almost always the flow sensor, sometimes called the turbine or water meter. It's a little plastic spinner that counts water flow pulses and reports to the control board. When it gets gummed up with debris or the fins crack, it spins too slowly or stops entirely. Water IS going in, but the board thinks flow is below what it expects and shuts the cycle down. The flow sensor on most Samsung dishwashers costs about $15-25 and is usually located down in the sump area. Part number varies by model so look yours up before ordering.
How long does the inlet valve usually last?
A good inlet valve should last 7-10 years under normal conditions. If yours is newer than that and already failing, check your water quality first because hard water and sediment kill these things fast. If it's over 8 years old and the solenoid tests bad, just replace it. A new Samsung inlet valve is $30-60 in parts and takes maybe 30 minutes to swap out. Way cheaper than a service call, and honestly it's a good preventive move if your dishwasher is getting up there in age.
Is it safe to keep trying to run the dishwasher when it's showing 4E?
The machine won't run a full cycle, it'll just error out each time. So you're not going to cause any damage by trying to start it. But don't repeatedly force it through cycles hoping it magically fixes itself. If the valve is partially failing, cycling it over and over can cause it to fail completely. Just go through the diagnostic steps, it's really not complicated, and get it sorted out.

Models Known to Experience 4E Errors

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

DW80R9950US, DW80R7061US, DW80K5050US, DW80J3020US, DW80M2020US, DW80H9930MS, DW80F600UTS, DW80J7550US

MS

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026