Quick Answer
LG washer error codes like HUB indicate communication issues between the display and control board. The primary fix is to perform a hard power reset by unplugging the unit for ten minutes.
The HUB code means your LG washer's main control board and display board stopped talking to each other. Ignore it and your washer just won't run, period. I see this a lot on WM series machines that are 5-7 years old, especially ones in humid basements or utility rooms. A hard reset clears it maybe 40% of the time. The rest need a harness check or a board replacement, usually $80-120 in parts.
LgWasher
About These Lg Washer Error Codes
OK so the HUB code, along with LE, OE, SUD and the rest covered here, is LG's way of telling you exactly which system is unhappy. Most of these you can fix yourself in under an hour if you know what to look for. HUB specifically shows up on machines that are a few years old or ones that caught a power surge. The fix is either totally free (reset) or about $100 in parts, and figuring out which one you're dealing with takes maybe 10 minutes.
Most Common Error Codes
Motor or drive system failure (LE)40%
Drain system blockage (OE, LD)24%
Excess suds from wrong detergent (SUD)14%
Door or lid latch problems (DE, DL)12%
Water inlet or overflow issues (FE, PE)10%
What does the HUB error code mean on an LG washer?
HUB means the main control board and display board lost communication. They talk over a wire harness, and when that signal breaks, you get HUB. Could be a loose connector, a damaged wire, moisture damage on one of the boards, or an outright board failure. Start with a 10-minute hard reset, that clears it about 40% of the time. If it keeps coming back, you're looking at a connector issue or a dead board. Boards run $40-120 depending on which one failed, and honestly most people can replace them without a tech.
How do I find my LG washer error code?
It shows right on the digital display panel on the front of the machine. Letters, numbers, or a mix of both. Some codes rotate between two screens, so watch for a couple seconds. If you see 'HUB' and then '03', both parts matter, write them both down. Take a photo with your phone before touching anything. If the display is completely dark, that's not really an error code problem, that's a power or main board issue. But for any code that's actually displaying, you can look it up in this guide and get a straight answer.
What are the most common LG washer error codes?
LE (motor locked), OE (won't drain), SUD (too many suds), UL (unbalanced load), and HUB (board communication failure) probably cover 80% of the calls I get on LG machines. Most of them are DIY-fixable. LE and OE are the most frequent on older machines. HUB tends to show up on units that are 5-7 years old or ones that went through a power surge. And CL just means the child lock got activated somehow, that's not even a real error, just press and hold the cycle selector for 3 seconds.
How do I use LG ThinQ to diagnose error codes?
Open the LG ThinQ app, find your washer in the device list, and tap Smart Diagnosis. Hold your phone's microphone right up to the washer's speaker (usually on the bottom front) and follow the on-screen instructions. The washer plays a series of tones, the app captures them and spits out a full diagnostic report. It's actually pretty solid for catching sub-codes or borderline sensor readings that the display alone won't show you. Works on any Wi-Fi enabled LG washer. If your machine's a bit older and not connected, you can still run a wired version of Smart Diagnosis through the power button sequence.
Can I fix the HUB error myself or do I need a technician?
Honestly depends on the cause. Hard reset clears it? Free, five minutes, done. Loose harness connector? That's a 30-minute DIY fix with just a screwdriver. Dead main control board? Still very doable for a handy homeowner, the part's about $100 and it's basically unplug the old one, plug in the new one. I replaced three main boards on WM4000 units just last week, nothing exotic about it. Where a tech actually earns their money is when you can't figure out which board is bad and you don't want to guess at $100 a pop.
Are LG washer error codes the same across all models?
Mostly yes. The big ones like LE, OE, SUD, and HUB are consistent across WM front-load and WT top-load series. A few codes vary by model. Some machines show U5 instead of UL for an unbalanced load. Codes related to steam functions only show up on steam models. If you're looking at a code that's not in this guide, grab your model number from the sticker inside the door frame and search it specifically. The model number will tell you exactly which code library your machine uses.
Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.
Models Known to Experience HUB Errors
This repair applies to most Lg washers with this error code. Common model numbers include:
WM3700HWA, WM4000HWA, WM5000HVA, WM8100HVA, WT7300CW, WT7800CW, WT1501CW, WM3900HBA, WM6998HBA, WT7410CW
Last verified for technical accuracy on March 13, 2026