What UE means
The load is unbalanced in the drum, so the washer can't spin safely. Ur means the washer is adding water and retrying the spin, which isn't a fault.
Also shown as: Ub, U6, Ur, depending on the model.
Likely causes
- One heavy item (a rug, a bathmat, a single pair of jeans)
- Tangled laundry
- Washer not level
Safe first checks
- Pause, untangle the laundry and spread it evenly around the drum.
- Close the door and press Start to retry the spin.
When to stop
If it happens on every load, the washer may not be level or may have a suspension problem that needs service.
Checked against: Samsung US: Washing machine information and error codes. Codes can differ by model and year, so confirm with your owner's manual.