Both hot and cold fill slowly
Every cycle takes longer than normal, and the tub level creeps up instead of coming in with a steady rush.
Start here: Check both supply faucets, both hoses, and house-side flow before blaming the washer.
Washer fill problem
LG Washer Fills Slowly
Direct answer: If an LG washer fills slowly, the usual cause is restricted incoming water: a faucet not fully open, a kinked supply hose, clogged washer inlet screens, or weak flow from the house side. If both hot and cold supplies are strong at the hoses but the tub still fills slowly, the washer water inlet valve is the main suspect.
Most likely: Start with the water supply hoses and the small inlet screens where the hoses connect to the washer. Those plug up far more often than people expect, especially after plumbing work or older galvanized piping starts shedding grit.
Separate the lookalikes first: a washer that fills slowly is different from one that will not fill at all, and different again from one that pauses because the drain hose is siphoning water back out. Reality check: a machine can seem "slow" when the house water pressure is just weak that day. Common wrong move: replacing the washer before checking the faucet flow into a bucket.
Don’t start with: Don’t start by ordering an electronic control or tearing the washer apart. Slow fill is usually a water path problem, not a board problem.
If only hot or only cold is slow,focus on that one supply hose, faucet, and inlet screen first.
If the washer fills, then seems to stall while water disappears,check for a drain hose shoved too far down the standpipe causing siphoning.
Last reviewed: 2026-04-17
What slow fill looks like on a washer
Only hot fills slowly
Warm or hot cycles drag out, but cold-only cycles seem closer to normal.
Start here: Check the hot faucet, hot hose, and hot-side washer inlet screen for restriction.
Only cold fills slowly
Cold cycles take forever, and rinse fill may be especially slow.
Start here: Check the cold faucet, cold hose, and cold-side washer inlet screen first.
It fills slowly and seems to drain at the same time
You hear water entering, but the level barely rises or drops back down between fills.
Start here: Look at the drain hose height and how far it is pushed into the standpipe before chasing fill parts.
Most likely causes
1. Partly closed supply faucet or weak house water flow
This is the most common outside-the-washer cause, and it affects fill speed immediately on one side or both.
Quick check: Shut the washer off, remove the hose from the washer end, and briefly run that hose into a bucket. You should get a strong stream, not a weak dribble.
2. Kinked washer fill hose or clogged washer inlet screen
A bent hose or sediment-packed screen chokes flow even when the house pressure is decent.
Quick check: Pull the washer forward enough to inspect the hoses, then look into the washer hose ports for debris on the small metal or plastic screens.
3. Drain hose siphoning water out during fill
The washer can look like it is filling slowly when water is actually leaving as fast as it comes in.
Quick check: Make sure the drain hose is not sealed into the standpipe and is not pushed excessively deep.
4. Failing washer water inlet valve
If supply flow is strong and screens are clean, the valve inside the washer may be sticking or not opening fully.
Quick check: With hoses removed and screens cleaned, compare house-side flow to washer fill speed. Strong hose flow but weak tub fill points back to the valve.
Step-by-step fix
Step 1: Check the easy outside-water issues first
Most slow-fill complaints are caused by the supply side, and you can confirm that without opening the washer.
- Turn the washer off.
- Verify both water supply faucets are fully open, not just cracked open.
- Pull the washer forward carefully and look for crushed or sharply bent fill hoses.
- If the problem happens only on warm, test a cold-only cycle and then a hot-only or warm cycle to see whether one side is clearly weaker.
- Listen during fill: a healthy fill usually sounds like a steady rush, not a thin hiss.
Next move: If opening a faucet fully or straightening a hose restores normal fill speed, run a full cycle and keep an eye on the hose routing when you push the washer back. If the hoses look fine and the problem remains, test actual water flow next.
What to conclude: You’re separating a simple supply restriction from a washer-side problem before buying anything.
Stop if:
- You see active leaking at a faucet, hose, or washer connection.
- A hose looks swollen, cracked, or ready to burst.
- Moving the washer risks damaging the floor or pulling the drain loose.
Step 2: Test water flow from the house side
This tells you whether the slow fill is really the washer or just weak water delivery to it.
- Turn both supply faucets off.
- Place a bucket under the washer hose connections.
- Disconnect one hose from the washer at a time.
- Aim the hose into the bucket and briefly open that faucet.
- Repeat for the other hose.
- Compare the two streams. One weak side usually means a supply-side restriction on that line.
Next move: If one or both hoses have weak flow, the washer is probably not the main problem. Fix the faucet, hose, or house-side supply issue first. If both hoses deliver strong flow into the bucket, move on to the washer inlet screens and drain hose setup.
What to conclude: Strong bucket flow means the house is feeding the washer properly. Weak bucket flow means the restriction is upstream of the washer.
Step 3: Clean the washer inlet screens and rule out siphoning
Sediment at the washer ports is a very common slow-fill cause, and siphoning can mimic the same complaint.
- With the hoses still off and the faucets off, look into the washer water inlet ports.
- If you see grit or scale on the screens, gently remove loose debris without damaging the screen.
- Rinse the screens with plain water if accessible, or wipe away buildup carefully. Do not jab hard enough to deform them.
- Reconnect the hoses and turn the faucets back on slowly while checking for leaks.
- Inspect the drain hose at the standpipe. It should not be taped airtight into the pipe, and it should not be shoved so deep that it can siphon.
Next move: If fill speed improves after cleaning the screens or correcting the drain hose position, run a normal cycle and recheck for leaks. If screens are clean, the drain setup looks right, and fill is still weak, the washer water inlet valve becomes much more likely.
Step 4: Decide whether the washer water inlet valve is the likely failure
Once outside flow is strong and the screens are clear, the valve inside the washer is the main component left in the fill path.
- Run a fill cycle again after the earlier checks.
- Notice whether the washer still fills with a weak, thin stream even though the supply hoses tested strong into a bucket.
- Pay attention to whether only one temperature side is weak or whether both are slow.
- If the machine sometimes fills normally and other times drags, that inconsistency also points to a sticking washer water inlet valve.
Next move: If the symptoms line up with a weak or sticking valve, replace the washer water inlet valve that matches your model and the affected temperature side or assembly. If fill speed is normal now, the issue was likely a supply restriction or screen blockage. If the washer still behaves oddly in ways that do not match simple slow fill, stop guessing and diagnose the control or sensing side separately.
Step 5: Finish with a leak check and a full-cycle test
A washer that fills at the right speed still is not fixed if a hose drips or the machine siphons during the rinse.
- After any cleaning or valve replacement, turn both faucets on fully.
- Watch the hose connections and the washer inlet area for several minutes.
- Run a cycle that uses both wash fill and rinse fill.
- Confirm the tub reaches level promptly, the cycle advances normally, and water is not draining away during fill.
- Push the washer back carefully without kinking the hoses.
A good result: If the washer fills at a normal pace on both wash and rinse and stays dry at the connections, the repair is done.
If not: If it still fills slowly after strong supply flow, clean screens, proper drain hose setup, and valve replacement, the problem is no longer a simple homeowner fill restriction. Schedule appliance service for deeper diagnosis.
What to conclude: You’re confirming the actual complaint is gone, not just that one test looked better.
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FAQ
Why does my washer fill slowly only on hot water?
That usually points to the hot side only: the hot faucet may be partly closed, the hot hose may be kinked, or the hot-side washer inlet screen may be packed with sediment. If hot hose flow into a bucket is strong and the screen is clean, the hot side of the washer water inlet valve may be sticking.
Can low house water pressure make my washer seem broken?
Yes. If both supply hoses run weak into a bucket, the washer is only getting what the house is delivering. In that case, fix the supply issue first instead of replacing washer parts.
How do I know if the washer inlet screen is clogged?
When you remove the fill hose from the washer, look into the inlet port. If you see grit, rust flakes, or mineral buildup on the small screen, flow can be restricted enough to slow the fill noticeably.
Can a drain hose problem look like a slow-fill problem?
Yes. If the drain hose is pushed too far into the standpipe or sealed in tightly, the washer can siphon water out while it fills. The machine sounds like it is taking water, but the level rises very slowly or not at all.
Should I replace the washer water inlet valve right away?
Not first. Check the faucets, hose condition, house-side flow, and inlet screens before buying a valve. Replace the washer water inlet valve only after those checks support that diagnosis.
Is it normal for some cycles to fill slower than others?
A little variation is normal because different cycles use different water levels and temperature mixes. What is not normal is a sudden change where the washer takes much longer than it used to or one temperature side becomes obviously weak.