Quick diagnosis
What this code is telling you
Most likely trigger
Single bulky item (blanket/rug) caught on one side
Recommended replacement
Suspension Damper Rod Set
Diagnostic path
3 ordered checks
Part fit
Exact model number required
Safety first
Before opening the appliance
Unplug the appliance before removing panels or testing internal components. Do not bypass safety switches or live-test high-voltage, gas, refrigerant, or combustion components unless you are qualified to do so.
Read the full safety disclaimerRoot cause
Why the control reported this error
The washer sets this code when its control cannot confirm the expected wash-cycle condition. Start by ruling out single bulky item (blanket/rug) caught on one side. unlevel machine chassis and worn damper suspension rods can create the same feedback, so confirm the failure before replacing suspension Damper Rod Set.
Symptoms
What you may notice
- ✓Washer attempts spin then slows down repeatedly
- ✓Thumping noise inside drum
- ✓UB code appears on control display
Possible causes
Check the most likely causes first
- 1
Single bulky item (blanket/rug) caught on one side
Start here when it matches your symptoms.
- 2
Unlevel machine chassis
- 3
Worn damper suspension rods
Diagnostic sequence
Work through these checks in order
Stop when you find the fault. Do not perform a step that requires skills or live testing you are not qualified to do.
- 1
Check 1
Open door, untangle laundry, and evenly space heavy garments around drum.
- 2
Check 2
Adjust leveling feet beneath cabinet using a level tool until fully stable.
- 3
Check 3
Check drum bounce by pressing down from top; if drum swings loosely, replace 4 suspension rods.
Replacement part reference
Suspension Damper Rod Set
Exact OEM part number
Model number required
Fitment note
The exact OEM part number varies by model and production revision. Verify the complete model number before ordering.
Verify the appliance model before ordering.
Manufacturers can use different parts under the same error code across model families and production revisions.
Where do I find my model number? →FixCodeDB may earn a commission from qualifying purchases made through affiliate links.
Common questions
Quick answers for this fault
What should I check first for UB?
Start with single bulky item (blanket/rug) caught on one side. If that checks out, continue through the diagnostic sequence above rather than replacing a part based on the code alone.
Does UB always mean Suspension Damper Rod Set is bad?
No. An error code identifies the condition the control detected, not a guaranteed failed part. Confirm the likely causes and wiring first. The exact OEM part number varies by model and production revision. Verify the complete model number before ordering.
When should I stop troubleshooting UB myself?
Stop if the next step requires live electrical testing, sealed-system work, gas or combustion service, or any procedure outside your training. Unplug the appliance before removing panels or testing internal components. Do not bypass safety switches or live-test high-voltage, gas, refrigerant, or combustion components unless you are qualified to do so.
Manufacturer reference
Verify against the official support source
FixCodeDB summarizes the fault in plain language. For model-specific instructions, confirm the guidance with the manufacturer and your appliance manual.
Samsung Washer Error Codes — Samsung Support →Was this useful?
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Keep diagnosing
Related Samsung guides
Samsung washer 4C (formerly 4E) indicates water is not entering the tub within the designated time frame.
Samsung 5C (or 5E) signals the washer failed to pump water out of the drum during drain cycle.
The dishwasher reports 3C when the pump is not operating correctly.
3E means the incoming water supply is too hot for the dishwasher.
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