- Appliances
- Washing machines
Ub
Samsung Ub on a washing machine: unbalanced load
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
The washer detects that the load is unbalanced in the drum and will not finish the spin. Open the door, untangle and spread the laundry, close the door and restart the cycle.
Safety first
Stop and check this first
- Water from the emergency drain can be very hot: Samsung advises great care to avoid burns.
Safe checks you can perform
- Load spread in the drum
- Heavy items and load size
- Emergency drain if the door will not open
- Drum rotation on a short empty cycle
Leave these tasks to a qualified professional
- Do not attempt this professional task: Drum rotation diagnosis
- Do not attempt this professional task: Vibration detection check
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Drum rotation diagnosis
What they doIf the drum does not turn on the empty cycle, the technician checks the motor and its control with instruments.
They must show youthe measurement or fault reading that locates the problem.
In writingwhich part failed and why.
Vibration detection check
What they doIf Ub repeats with balanced loads, the technician inspects the drum suspension and, on models that have one, the vibration sensor.
They must show youthe faulty item or the measurement.
In writingpart number and a spin test.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Load spread in the drum
- Who:
- you.
- How:
- open the door, untangle the items and spread them so the weight is even; close the door and press Start.
- Result that matters:
- whether the washer completes the spin.
- If it finishes:
- it was the load distribution.
- If Ub returns:
- check the type of load.
- Evidence to keep:
- note of which items were inside.
Evidence: Samsung USA washing machine error codes · Samsung España qué hacer si tu lavadora no centrifuga
Heavy items and load size
- Who:
- you.
- How:
- if there is a single heavy item or trainers, add items or put them in a laundry bag with more laundry; if the drum is packed, take out bulky items.
- Result that matters:
- a balanced load that is not overloaded.
- If it finishes with the corrected load:
- the load was the cause.
- If Ub returns with normal loads:
- move on to the next check.
- Evidence to keep:
- date and type of load at each alert.
Evidence: Samsung España qué hacer si tu lavadora no centrifuga
Emergency drain if the door will not open
- Who:
- you, with the washer off and unplugged.
- How:
- if water remains and the door will not open, follow Samsung's emergency drain: container and towel under the filter cover, emergency tube, then clean the filter.
- Result that matters:
- draining the water safely.
- If water comes out and the filter had debris:
- clean it and refit it firmly closed.
- If no water comes out or the door stays locked:
- request service.
- Evidence to keep:
- photo of the filter.
Evidence: Samsung España cómo desaguar tu lavadora en caso de emergencia
Drum rotation on a short empty cycle
- Who:
- you.
- How:
- run a short cycle with no laundry or detergent and watch through the door whether the drum turns after filling.
- Result that matters:
- whether the drum turns (stopping and starting several times is normal).
- If it turns:
- the problem lies in the loads; repeat with balanced loads.
- If it does not turn at all:
- Samsung says it probably needs a technician.
- Evidence to keep:
- short video of the drum.
Evidence: Samsung España qué hacer si tu lavadora no centrifuga
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Samsung
- Product type
- Washing machines
Known code variants
- 1 Ub
- Error Ub Samsung
- Samsung Ub code
- Samsung washer Ub
- UB
- Ub lavadora Samsung
What it means
Samsung groups Ub with UE, dc (on some models) and 1 Ub as an unbalanced load error: the laundry is not spread in the drum and the washer will not complete the cycle. Ur is different: it means the machine is retrying to balance and is not a fault. Items of very different weights, a single heavy item or an overloaded drum cause the imbalance. If the code repeats with well spread loads, the laundry is no longer the cause and it needs inspection: the code does not point to any part.
Warnings and stop conditions
- Mediumsource verified
Water from the emergency drain can be very hot: Samsung advises great care to avoid burns.
Evidence: Samsung España cómo desaguar tu lavadora en caso de emergencia
Symptoms and causes
Probable causes · in order
- Tangled or poorly spread laundryCommon
The cause Samsung gives. You see it when you open the door: items wound to one side of the drum.
Evidence: Samsung USA washing machine error codes · Samsung España qué hacer si tu lavadora no centrifuga
- A single heavy item or very different weightsCommon
For example one large towel with T-shirts, or trainers on their own. Samsung advises balancing with more laundry.
Evidence: Samsung España qué hacer si tu lavadora no centrifuga
- Overloaded drumPossible
Too much laundry prevents an effective spin. You notice the drum is packed.
Evidence: Samsung España qué hacer si tu lavadora no centrifuga
Virtual technician
Does Ub still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Samsung USA washing machine error codes
Samsung · official_doc
- 2
Samsung España qué hacer si tu lavadora no centrifuga
Samsung · 2026 · official_doc
- 3
Samsung España cómo desaguar tu lavadora en caso de emergencia
Samsung · 2022 · official_doc
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