Bucket fills normally instead of draining
The unit is pulling moisture, but water ends up in the bucket and the hose stays mostly dry.
Start here: Start with hose routing and the drain outlet at the back or side of the dehumidifier.
Dehumidifier not draining
LG Dehumidifier Drain Hose Not Draining
Direct answer: Most LG dehumidifiers that will not drain through the hose have a simple drain-path problem first: a kinked hose, a hose that runs uphill, a clogged drain outlet, or a bucket/float that is not sitting right. Start there before assuming an internal failure.
Most likely: The most likely cause is a bad gravity-drain setup or a partial clog right at the dehumidifier drain connection.
If the bucket fills even though the hose is attached, or water dribbles instead of flowing steadily, treat it like a drain-path problem until proven otherwise. Reality check: these units do not push water uphill unless the model has a working pump setup. Common wrong move: shoving the hose farther onto the fitting while leaving a sag or uphill loop behind the machine.
Don’t start with: Do not start by buying a pump or opening the cabinet. On this symptom, the hose path and bucket area solve more calls than internal parts do.
Bucket still filling?Check whether the hose route actually slopes downward the whole way.
No water at the hose end?Pull the hose off and make sure the drain outlet on the dehumidifier is not packed with slime or debris.
Last reviewed: 2026-04-17
What this usually looks like
Water leaks near the bucket or base
You see water on the floor or around the bucket area instead of at the hose end.
Start here: Check for a blocked drain outlet, a loose hose connection, or a bucket that is not fully seated.
Drain worked before and then quit
The hose used to drain fine, then the bucket started filling or the unit shut off on full bucket.
Start here: Look for slime, lint, or a new low spot in the hose that is holding water.
Full-bucket light or shutoff with hose attached
The machine stops as if the bucket is full even though you expect continuous draining.
Start here: Inspect bucket position, float movement, and the dehumidifier bucket switch area for sticking or misalignment.
Most likely causes
1. Drain hose routed uphill, kinked, or sagging
Gravity drain needs a steady downhill run. One loop, pinch, or low spot can trap water and stop flow.
Quick check: Disconnect the hose and lay it out straight. If trapped water pours out or the hose has a belly in it, fix the routing first.
2. Clog at the dehumidifier drain outlet or inside the hose
Dust, slime, and mineral film collect where water first leaves the unit. That restriction is enough to send water back to the bucket.
Quick check: Remove the hose and inspect the outlet opening with a flashlight. If it looks slimy or crusted, clean it before testing again.
3. Bucket not fully seated or float not moving freely
Many dehumidifiers still rely on proper bucket and float position even when a hose is attached. If the float sticks, the unit may act full and stop draining.
Quick check: Remove and reinstall the bucket firmly, then move the float gently by hand to make sure it rises and drops without hanging up.
4. Faulty dehumidifier bucket switch or water level switch
If the hose path is clear and the bucket/float is seated correctly but the unit still trips full-bucket or refuses to drain properly, the sensing switch becomes more likely.
Quick check: After cleaning and reseating everything, run the unit in a humid room. If it quickly returns to full-bucket behavior with no drain blockage found, the switch branch is worth considering.
Step-by-step fix
Step 1: Make sure the hose can actually gravity-drain
A dehumidifier drain hose has to run downhill the whole way. This is the fastest, safest check and the most common fix.
- Turn the dehumidifier off and unplug it.
- Trace the full hose from the dehumidifier to the drain point.
- Remove any kink, sharp bend, or pinch behind the unit.
- Eliminate low spots where water can sit in the hose.
- Make sure the hose outlet is lower than the dehumidifier drain connection for the entire run.
- If the hose is shoved deep into a floor drain or standpipe, pull it back enough so the end is not sealed airtight.
Next move: If water starts flowing steadily after rerouting, keep the hose supported so it stays downhill and you are done. If the hose route is good and the bucket still fills, move to the drain outlet and clog check.
What to conclude: You have ruled out the most common installation problem.
Stop if:
- The hose connection or cabinet area is cracked and leaking water.
- You find the unit would need to drain uphill to work in this location.
- Water has already soaked flooring, trim, or nearby electrical cords.
Step 2: Clear the drain outlet and hose
A partial clog at the outlet or inside the hose will stop or slow drainage even when the hose looks fine from the outside.
- Keep the unit unplugged.
- Disconnect the drain hose from the dehumidifier.
- Look into the dehumidifier drain opening with a flashlight.
- Wipe away visible slime or debris at the opening with a soft cloth or cotton swab.
- Flush the hose with warm water at a sink or tub until it runs clear.
- If the hose is stiff, cloudy, or still restricted after flushing, replace it with the same inside diameter and a simple downhill run.
Next move: If the hose and outlet clear out and the unit drains normally, the problem was a blockage in the drain path. If the outlet is clear and a clean hose still does not drain, check the bucket and float area next.
What to conclude: You have ruled out the other very common no-drain cause without opening the machine.
Step 3: Reseat the bucket and check the float movement
On many dehumidifiers, a slightly crooked bucket or sticky float will trigger full-bucket behavior and interrupt normal draining.
- Remove the bucket completely.
- Empty and rinse it if it has sludge or buildup.
- Inspect the float in the bucket area and move it gently to make sure it is not stuck.
- Clean away lint or residue around the float path using warm water and mild soap on a cloth, then dry the area.
- Reinstall the bucket carefully so it sits fully flush and latched in place.
- Run the unit with the hose attached and watch whether water now leaves through the hose instead of collecting in the bucket.
Next move: If reseating the bucket or freeing the float restores draining, the issue was a position or float problem rather than a failed internal part. If the bucket is seated correctly and the float moves freely but the unit still acts full or will not drain, the switch branch becomes more likely.
Step 4: Decide whether the hose or the switch is the real failure
By this point, the easy drain-path causes should be ruled out. Now you want one clean answer before buying anything.
- Run the dehumidifier for a while in a humid space after the hose route, outlet, and bucket checks are done.
- Watch for one of two patterns: water reaches the bucket because the hose path still cannot carry it away, or the unit trips full-bucket behavior even though the drain path is open.
- If the hose is old, brittle, permanently kinked, or repeatedly clogs, treat the hose as the failed part.
- If the hose is clear and properly routed, the bucket is seated, the float moves freely, and the machine still reports full-bucket or stops draining, treat the dehumidifier bucket switch or dehumidifier water level switch as the likely failed part.
Next move: If replacing the bad hose or correcting the drain path solves it, no further repair is needed. If the machine still misreads water level after all of that, the sensing switch is the most supported DIY part path on this symptom.
Step 5: Replace the confirmed part or stop before deeper electrical teardown
Once the failure pattern is clear, finish with the simplest supported repair. If the diagnosis still is not clean, this is where you stop instead of chasing internal faults.
- Replace the dehumidifier drain hose if the old hose is kinked, restricted, brittle, or the wrong size for a reliable downhill drain.
- Replace the dehumidifier bucket switch or dehumidifier water level switch only if the drain path is clear, the bucket and float are positioned correctly, and the unit still behaves like it is full.
- After replacement, run the dehumidifier long enough to confirm steady hose drainage and no full-bucket shutdown.
- If the unit still will not drain after a confirmed hose or switch repair, schedule service rather than moving on to pump, fan, or control guesses from this symptom alone.
A good result: A steady drain stream, no bucket overflow, and no false full-bucket shutoff confirm the repair.
If not: If the same symptom remains after a supported repair, the problem is deeper than the normal homeowner drain-path fix.
What to conclude: You either finished the job cleanly or reached the right stopping point before wasting more time and parts.
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FAQ
Why is my LG dehumidifier filling the bucket when the hose is attached?
Usually because the hose is not draining by gravity. A kink, uphill run, low spot, or clog at the drain outlet will send water back to the bucket. A misseated bucket or sticky float can also make the unit act like continuous drain is not working.
Does a dehumidifier drain hose need to slope downward the whole way?
Yes, for a gravity-drain setup it does. If any section runs uphill or sags enough to trap water, drainage can slow down or stop completely.
Can I clean the dehumidifier drain hose instead of replacing it?
Yes. Flush it with warm water first. If it clears and stays open, keep using it. Replace it only if it stays restricted, has permanent kinks, or has gone brittle.
Why does the full-bucket light come on when the hose is connected?
That usually points to a bucket position issue, a sticky float, or a dehumidifier bucket switch or water level switch that is misreading the water level. Rule out hose routing and clogs first, because those are more common.
Should I replace the pump if my dehumidifier hose is not draining?
Not from this symptom alone. Most homeowner no-drain calls on a hose setup come down to routing, clogs, or bucket/float sensing. Do those checks first before chasing deeper internal parts.
What if the hose drains only a little water and then stops?
Look for a partial clog or a low spot in the hose holding water. That pattern is classic for slime buildup or a hose run that sags after the unit is pushed back into place.