Samsung Washer code **BUB** is associated with **eco bubble system/mode issue**. The display identifies the system or condition the control detected, but it does not by itself prove which individual part should be replaced. The useful diagnostic value of the code is the subsystem it identifies. A good repair process confirms the symptom, checks the accessible external conditions, and then follows the model-specific circuit only if the display returns. The recorded display form is **BUB**. Search normalization stores it as **BUB** while preserving the characters a homeowner actually sees.
Reviewed by Ethan Mercer · Last reviewed August 17, 2026
Written by
Ethan Mercer Appliance Repair Content SpecialistPublished August 17, 2026Updated August 22, 2026Technically reviewed August 17, 2026
Content status:
Verified
Error codeBUB
ApplianceWasher
Quick answer
Eco Bubble system/mode issue.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so BUB may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Samsung Washer code **BUB** is associated with **eco bubble system/mode issue**. The display identifies the system or condition the control detected, but it does not by itself prove which individual part should be replaced. The useful diagnostic value of the code is the subsystem it identifies. A good repair process confirms the symptom, checks the accessible external conditions, and then follows the model-specific circuit only if the display returns. The recorded display form is **BUB**. Search normalization stores it as **BUB** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
On affected Samsung washing machine models, the appliance may stop or limit the affected function when the code is detected.
Depending on the exact model, the same code may return at a repeatable stage of operation.
One clue that supports the BUB diagnosis is that other symptoms depend on the model and the subsystem named by Samsung.
A symptom that fits BUB is that bUB appears during the washer stage associated with eco bubble system/mode issue.
One clue that supports the BUB diagnosis is that the cycle may pause, stop, retry, drain, or refuse to advance until the condition is cleared.
Why it happens
Possible causes
varies by model — official regional/current support — Eco Bubble system/mode issue
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
With BUB recorded, record the exact code, model number, and operating stage before resetting power.
Before opening any service area, complete only the owner-accessible checks described in the model manual.
To rule out an accessible cause, do not replace parts solely from a display code when wiring, conditions, or control feedback can create the same result.
Before requesting service for BUB, record the code and the cycle stage where it appears.
To rule out an accessible cause, verify owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
Before requesting service for BUB, power-cycle once only where Samsung's guidance recommends it; if the same code reappears, move to model-specific diagnosis.
Important safety warning. Disconnect power and stop use for active leakage near electrical parts, smoke, burning smell, or repeated breaker trips. If resolving BUB would require energized internal access, that is the point to hand the diagnosis to a qualified technician.
Get help
When to request repair service
If the code returns after the documented basic checks, request model-specific diagnosis of the affected subsystem. A repeatable BUB event is more useful diagnostically than repeated resets, because it shows when the eco bubble system/mode issue check is failing.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
A single documented power reset can help after an external condition or power event is corrected. If **BUB** returns at the same stage, repeated resets only erase useful evidence and do not repair the cause.
That depends on the accompanying symptom. A code with no safety hazard may allow a short diagnostic check, but **BUB** should not be ignored if performance is deteriorating or the display keeps returning.
No. **BUB** tells you which condition or check the control detected. The same display can result from the named component, its wiring, a connector, a supply/airflow/water condition, or the control that reads it.
The same-looking code can be reused on another Samsung appliance family or reformatted by region/model year. Match the appliance type and exact model before applying a meaning. This page therefore keeps **Washer BUB** separate from same-looking codes used by other Samsung appliance families.
