Water rises while the washer is off
The tub is empty after a load, then hours later there is fresh water in the basket or drum.
Start here: Unplug the washer and see whether water still enters. If it does, focus on the washer water inlet valve.
Washer Overflowing
Samsung Washer Fills When Off
Direct answer: If a Samsung washer keeps filling when it is turned off, the most common cause is a washer water inlet valve that is not closing all the way. First make sure the tub is actually filling from the supply and not backflowing through the drain hose.
Most likely: A washer water inlet valve is stuck open with grit, scale, or internal wear, so water keeps seeping into the tub even with no cycle running.
Start simple: empty the tub, shut the washer off, and watch where the water comes from. If the water level rises with the machine idle, you are usually dealing with a valve that is leaking by. Reality check: even a slow trickle can turn into an overflow overnight. Common wrong move: unplugging the washer and assuming the problem is solved without shutting off the water supply.
Don’t start with: Do not start by replacing the washer control board. On this symptom, the inlet valve is far more common than an electronic failure.
If water still enters with the washer unplugged,suspect the washer water inlet valve first.
If the tub seems to refill after draining,check the washer drain hose height and routing before buying parts.
Last reviewed: 2026-04-17
What this usually looks like
Washer fills only a little at a time
You do not hear a full fill, just a slow seep or occasional trickle into the tub.
Start here: Check the supply hoses and inlet screens for debris, then assume the washer water inlet valve is leaking by unless proven otherwise.
Tub seems to refill after it drains
The washer drains out, but later you find dirty or gray water back in the tub.
Start here: Look at the washer drain hose height and whether the hose is shoved too far into the standpipe. That can mimic a fill problem.
Water enters only on one temperature setting
The problem is worse on warm or cold selections, or you hear water from one side only.
Start here: That points to one side of the washer water inlet valve assembly not sealing properly.
Most likely causes
1. Washer water inlet valve stuck partly open
This is the classic cause when clean water keeps entering an idle washer, especially if it still happens with the washer unplugged.
Quick check: Turn both supply faucets on, unplug the washer, and watch the tub. If water continues to enter, the valve is leaking by mechanically.
2. Debris or scale caught in the washer water inlet valve
Sediment from the supply line can keep the valve from seating fully, causing a slow fill instead of a full rush.
Quick check: Shut off the water, remove the supply hoses, and inspect the inlet screens for grit or mineral buildup.
3. Washer drain hose installed too low or too deep
A siphon or backflow issue can leave water in the tub and make it look like the washer filled itself.
Quick check: Make sure the washer drain hose rises high before entering the standpipe and is not taped or jammed airtight into the drain.
4. Washer control board or wiring keeping the valve energized
This is less common, but possible if the washer only fills when plugged in and stops immediately when power is removed.
Quick check: If the unwanted fill stops the moment you unplug the washer, the valve may be getting power when it should not.
Step-by-step fix
Step 1: Confirm whether the water is coming from the supply side or the drain side
These two problems look alike, but the fix is completely different. You want to separate a leaking inlet valve from a drain hose backflow issue before touching parts.
- Cancel any cycle and drain the washer if needed so the tub starts empty.
- Dry the inside of the tub as much as you can and leave the door or lid open so new water is easy to spot.
- Unplug the washer from the outlet.
- Wait 15 to 30 minutes and check whether clean water is appearing from the fill area or whether water seems to be creeping back into the tub after a drain.
- If the tub is filling fast enough to risk overflow, shut off both water supply faucets right away.
Next move: You now know whether the washer is truly filling from the supply or whether water is returning through the drain path. If you cannot tell where the water is coming from, move to the drain hose check next, then repeat the unplugged test.
What to conclude: Water entering with the washer unplugged strongly points to a washer water inlet valve problem. Water that shows up mainly after draining can be a drain hose installation issue instead.
Stop if:
- Water is rising quickly and you need to shut off the supply to prevent overflow.
- The floor is already wet enough to create a slip or water-damage risk.
Step 2: Rule out a washer drain hose siphon or backflow problem
A bad drain hose setup can leave water in the tub and send you after the wrong part.
- Pull the washer forward enough to see the full drain hose path.
- Check that the washer drain hose rises up before it enters the standpipe or laundry sink.
- Make sure the hose is not pushed so far down the standpipe that it forms a tight seal.
- Look for a hose end that is taped in place airtight or stuffed deep into the drain opening.
- If the hose routing is obviously wrong, correct it, run a drain or rinse cycle, then leave the washer off and recheck later.
Next move: If the mystery water stops after correcting the hose setup, you had a siphon or backflow issue rather than a bad fill valve. If water still appears in the tub while the washer sits idle, go to the supply valve checks.
What to conclude: A proper drain hose setup removes one of the main lookalikes. If the symptom remains, the inlet side becomes much more likely.
Step 3: Check the supply hoses and inlet screens for debris
Sediment can hold the washer water inlet valve slightly open or restrict one side enough to create odd warm-cold fill behavior.
- Shut off both water supply faucets.
- Place a towel under the hose connections at the back of the washer.
- Disconnect the hot and cold supply hoses from the washer.
- Inspect the washer inlet screens for sand, rust flakes, or mineral buildup.
- If the screens are dirty, rinse them gently with water or wipe them carefully. Do not stab or pry the screens out unless the design clearly allows it.
- Reconnect the hoses, open the faucets, and watch for drips.
Next move: If the slow fill stops after clearing debris and reconnecting the hoses, the valve may have been held open by sediment. If the washer still fills while off, the washer water inlet valve itself is likely worn or not sealing internally.
Step 4: Use the unplugged test to separate a bad washer water inlet valve from a control problem
This is the cleanest way to decide whether the valve is leaking mechanically or being told to open electrically.
- With the supply faucets on and the washer idle, unplug the washer again.
- Watch and listen at the fill area for several minutes.
- If water continues to enter with no power to the washer, shut off the faucets and treat the washer water inlet valve as failed.
- If the unwanted fill stops as soon as power is removed and returns only when the washer is plugged in, leave the faucets off until you can diagnose further.
- Do not keep testing by letting the tub fill unattended.
Next move: You have narrowed the problem to the most likely failed component or to the less common electrical control side. If the behavior is inconsistent, repeat the test after the washer has sat for a while. Intermittent valve seepage is still common.
Step 5: Replace the failed washer water inlet valve or keep the water off and call for service
Once the unplugged test points to the inlet valve, replacement is the direct repair. If the symptom points to controls instead, the safest move is a service call.
- If the washer fills while unplugged, shut off both supply faucets and replace the washer water inlet valve with a matching part for your model.
- Inspect the supply hoses while they are off. Reuse them only if they are in good shape and the washers seal properly.
- After replacement, restore water, plug the washer in, and let it sit off for at least 15 to 30 minutes to confirm the tub stays dry.
- Run a short fill and drain cycle and recheck the back connections for leaks.
- If the washer only fills when plugged in, keep the faucets off when the machine is not in use and schedule service for control or wiring diagnosis.
A good result: The tub stays empty while the washer is off, and the machine fills normally only during a cycle.
If not: If a new inlet valve does not stop water entering while unplugged, recheck part fit and hose routing, then bring in a technician because the diagnosis is no longer straightforward.
What to conclude: A confirmed valve failure is a solid DIY repair on many washers. A power-dependent fill problem is a different animal and should not start with guess-buying electronics.
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FAQ
Why does my Samsung washer fill with water when it is turned off?
Most of the time, the washer water inlet valve is not sealing all the way. Water pressure keeps pushing a slow stream into the tub even though no cycle is running.
If I unplug the washer and it still fills, what does that mean?
That usually means the washer water inlet valve is leaking mechanically, not being opened by the controls. With no power available, the valve should stay shut.
Can a bad drain hose setup make it look like the washer is filling by itself?
Yes. If the washer drain hose is too low, pushed too deep, or set up poorly at the standpipe, water can siphon or flow back into the tub and look like a fill problem.
Is this safe to ignore for a while?
No. A slow fill can become an overflow, especially overnight or while you are away. Until the problem is fixed, keep the water supply faucets off when the washer is not in use.
Could the control board be the cause instead of the inlet valve?
It can happen, but it is less common. Suspect the control side mainly when the unwanted fill happens only while the washer is plugged in and stops immediately when you unplug it.
Should I replace both the hot and cold valves together?
Many washers use a combined washer water inlet valve assembly, so you replace the whole unit. If your model uses a single assembly, that is the normal repair rather than changing one side only.