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LG Washing Machine Error Code UB

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: July 19, 2026
✓ Low Severity 🔧 Easy DIY

Unbalanced load — washer cannot distribute the load for spin

The most common cause of the UB error on a LG washing machine is single heavy/bulky item bunched on one side (~45% of cases); start with: redistribute the load.

💰 DIY cost: $0–$0 👨‍🔧 Pro cost: $100–$200 Save $100+ by doing it yourself
LG Washing Machine error code UB on the display panel
How the UB code appears on a LG washing machine display

What Does Error Code UB Mean on a LG Washing Machine?

Unbalanced load — washer cannot distribute the load for spin.

UB is a load-distribution warning, not a hardware fault. During the pre-spin ramp, the control board monitors drum motion and motor current for wobble that signals uneven weight. If the drum won't settle within limits, it adds water and re-tumbles to redistribute, retrying several times before halting with UB. Unlike LE, which flags a motor or rotor-lock/overcurrent fault, UB simply means the machine refused to accelerate an off-balance load to protect itself.

Models affected: LG front-load and top-load washers across the range, including models such as WM3900HWA, WM4000HBA, WM3400CW, WT7300CW, WM8100HVA, WM4500HBA, and WT7900HBA
What owners report: Owners commonly report UB after washing a single bulky item like a comforter, bath mat, or hoodie, or when a very small load rides to one side. Adding a couple of towels to balance the drum and confirming the machine sits level usually clears it on the next spin.

What Causes Error Code UB?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Single heavy/bulky item bunched on one side 45% of cases
  2. 2
    Too-small load can't balance 25% of cases
  3. 3
    Washer not level 20% of cases
  4. 4
    Worn suspension/dampers (older units) 10% of cases

How to Fix LG Washing Machine Error Code UB

🔧 Easy DIY Est. time: 10–20 min
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Redistribute the load

    Open the lid/door, separate tangled items, and add a couple of towels to balance a single bulky item.

  2. 2

    Level the washer

    Check with a level front-to-back and side-to-side; adjust the leveling feet so the unit doesn't rock.

    🔩 Adjustable wrench
  3. 3

    Run a smaller, mixed load

    Loading to about 2/3 capacity with mixed item sizes lets the drum balance.

How to Reset Error Code UB

Open the door, redistribute the laundry, close, and restart a Spin cycle. UB clears once the load balances.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full LG washer reset guide → Enter diagnostic mode → Symptom guide: Washer shaking or loud →

Did this guide fix your appliance?

When to Call a Professional

If UB occurs on every load even when balanced and level, the suspension dampers or rotor position sensor may need professional inspection.

Average professional repair cost for this issue: $100–$200

Related Error Codes

LE
Motor locked — hall sensor or stator fault
⚠ High Severity

Same Code on Other Brands

Error code UB appears on these other brands too. See every brand that shows UB →

Samsung logo
Samsung Washing Machine Ub
Unbalanced load — drum cannot reach spin speed safely

Find Replacement Parts

Use these links to find the exact replacement parts for your LG Washing Machine:

🔩
Search PartSelect
LG Washing Machine repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More LG Washing Machine Error Codes

OE Drainage error — water not draining within expected time UE Unbalanced load — cannot complete spin cycle IE Water inlet error — water not filling within expected time dE Door open or door lock failure tCL Tub clean reminder — drum needs cleaning FE Water overflow error — drum overfilling

Frequently Asked Questions

Can I keep using my LG Washing Machine when error UB appears? +
Usually yes — UB is a low-severity balance notice that rarely stops the washing machine from working, but clearing the underlying cause prevents it from escalating.
What most commonly causes UB on a LG Washing Machine? +
Across reported LG washing machine repairs, the most frequent is single heavy/bulky item bunched on one side (45% of cases), too-small load can't balance (25%), then washer not level (20%). Check them in that order before replacing any parts.
UB keeps coming back after a reset — what should I check next? +
A reset only clears the stored UB fault; if it returns, the balance problem is still present. Move on to the physical checks — redistribute the load, then level the washer — since the code will reappear until the root cause is resolved. This is a beginner-friendly job needing only basic hand tools.
How much does it cost to fix LG Washing Machine error UB? +
A DIY repair typically runs $0–$0 in parts, versus $100–$200 for a professional service call, so handling it yourself saves around $100. Expect the work to take about 10–20 minutes.
Which LG Washing Machine models show error UB? +
UB is documented on LG front-load and top-load washers across the range, including models such as WM3900HWA, WM4000HBA, WM3400CW, WT7300CW, WM8100HVA, WM4500HBA, and WT7900HBA. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: July 19, 2026.

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