LG Washer Smells Bad: Tub Clean Cycle, Door Seal

Quick Answer

LG front-load washers develop odor from the door boot seal fold like all front-loaders. LG's specific advantage: ThinQ-connected models send a reminder notification when the Tub Clean cycle is due. Run Tub Clean monthly with no clothes and no detergent (or add 2 cups vinegar). LG's door boot seal design has a slightly wider fold opening than Samsung, making cleaning easier.

Honestly, if you ignore this long enough, your clothes start smelling worse coming OUT of the washer than when they went in. I've seen that exact situation more times than I can count. The bacteria in that biofilm multiply fast in the warm, wet environment and eventually a normal wash cycle just redistributes the stink. Monthly tub cleans and leaving the door cracked are the only things that actually prevent it from coming back.

LgWasherSeverity: moderateDifficulty: intermediate75% DIY Success

Time to Fix

15–90 min

Difficulty

intermediate

Parts Cost

$0 (no parts needed)

Tools Needed

Microfiber cloths (at least 3), Old toothbrush or small scrub brush

LG Washer Smells Bad: Tub Clean Cycle, Door Seal

The gasket gets all the blame but I'd bet money the drain pump filter is what's really killing you here. That thing sits at the bottom left of your LG front-loader and it traps hair, debris, and a bunch of sludgy water that just sits there between washes and ferments. It's a five-minute job to clean it yourself and it'll probably fix the smell faster than anything else you try. No parts needed, no service call.

Most Likely Causes

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

Mold in door boot seal folds45%

Detergent residue buildup25%

Dirty drain pump filter20%

Excess detergent use10%

Symptoms You May Notice

Clothes smell musty or like a wet towel even right after coming out of a complete wash cycle, which is a dead giveaway that the tub itself is the source.
There's visible black or dark grey slime inside the fold of the rubber door seal when you peel it back, sometimes so thick it feels greasy.
The laundry room smells like a basement or locker room even when the machine isn't running.
Pulling the detergent drawer out reveals black spotting or pink slime on the drawer itself and on the ceiling of the drawer housing.
You open the drain filter access door at the bottom and get hit with a sewer-like smell before you even unscrew the cap.

Can you reset a Lg washer to clear the SMELLS code?

If your LG is stuck on a Tub Clean reminder or showing a suds error that won't clear, don't just turn it off at the panel. Actually unplug it from the wall and leave it for five full minutes so the board fully discharges. Plug it back in, then immediately run a Rinse and Spin cycle with no clothes to flush any leftover residue. Follow that up with a full Tub Clean cycle and the notification should clear.

Tools Required for Diagnosis

Microfiber cloths (at least 3)Old toothbrush or small scrub brushShallow bowl or baking dish for draining pump filterWhite vinegar (2 cups minimum)Dish soapFlashlight or phone lightLong-handled bottle brush for dispenser housing

Diagnostic Checklist

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

Frequently Asked Questions

How much does it cost to fix a smelly LG washer?

Honestly, usually zero dollars. Vinegar, a microfiber cloth, and about 20 minutes fixes it probably 90% of the time. If you want to use a commercial tub cleaner tablet instead of vinegar, those run about $5-8 for a pack of three at any hardware store. The only time you're spending real money is if the door boot seal is physically damaged or so deeply moldy it can't be cleaned out. Replacing that gasket on a front-loader runs $250-$400 with labor because there's significant disassembly involved.

Can I use bleach in the Tub Clean cycle instead of vinegar?

Yeah, you can. LG actually recommends chlorine bleach for stubborn mold. Pour about half a cup of liquid bleach directly into the drum, not the dispenser, and run the full Tub Clean. But don't mix bleach and vinegar, ever. Pick one or the other for each cleaning. I usually start with vinegar because it handles most situations without the risk. If the smell comes back after a vinegar run, switch to bleach the next time.

Why does the smell come back a week after I clean everything?

Almost always two things. First, you're closing the door completely right after a wash and trapping moisture inside the tub. Leave it cracked open a few inches after every load, seriously, this matters more than anything else for prevention. Second, you're probably using too much detergent. HE front-loaders need way less than the fill line on the measuring cup. I tell people to use about half of what they think they need. That extra foam is exactly what feeds the mold and keeps it coming back.

How often should I actually run Tub Clean on my LG?

Once a month is the right answer for most households. LG builds a cycle counter into ThinQ-connected models and sends a notification when it's due, which is actually a useful feature. If you're doing a lot of cold water cycles or washing heavily soiled items regularly, bump it up to every three weeks. The more you use the machine, the more residue accumulates. Monthly cleaning keeps biofilm from getting a foothold in the first place.

Is a smelly washer a sign something is mechanically broken?

Nope. Smell has basically nothing to do with mechanical failure. I've cleaned 10-year-old LG front-loaders that smelled terrible and ran perfectly fine after a deep clean. The drum, bearings, motor, and electronics are completely separate from this issue. Smell just means maintenance got skipped for a while. Clean it up, start doing monthly Tub Cleans, leave the door open between uses, and you won't hear from this problem again.

My LG ThinQ app keeps sending Tub Clean notifications. Can I just dismiss them?

Don't dismiss it for more than a week or two. That notification fires based on cycle count, not actual contamination, but it's a pretty accurate predictor of when buildup is starting. Run it that weekend. The earlier you catch it the less scrubbing you'll need to do. Dismissing it for months is exactly how people end up with serious mold that takes three or four cleaning cycles to knock out.

Same Fix Works on These Brands

Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience SMELLS Errors

This repair applies to most Lg washers with this error code. Common model numbers include:

WM3700HWA, WM4000HWA, WM3500CW, WM3900HWA, WM8100HVA, WM3600HWA, WM4500HBA, WM9000HVA

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 15, 2026