Samsung Error Code UB — Error Code UB

Service Guy AI • Washer • Medium severity • Intermediate skill • ~30 min repair

What Does Samsung Error Code UB Mean?

Samsung washer: Error Code UB

This is a medium-severity fault. The machine may complete the current cycle but is signalling a problem you should resolve before it escalates.

Possible Causes (4)

Samsung engineers identify the following root causes for fault code UB. Work through them in the order shown — they are listed from most common to least common.

1. Unbalanced load in the washer
2. Faulty door interlock preventing proper operation
3. Malfunctioning pressure switch not detecting water levels
4. Issues with the control board affecting cycle execution

Step-by-Step Troubleshooting (5 steps)

Follow this sequence to diagnose and clear Samsung error code UB. Power down and unplug the machine before any internal inspection.

1. Disconnect power before servicing the washer.
2. Check the load balance and redistribute clothes evenly.
3. Inspect the door interlock for proper engagement and functionality.
4. Test the pressure switch for continuity and replace if faulty.
5. Examine the control board for any visible damage or burnt components.

Required Parts

Have these Samsung OEM part numbers ready before starting the repair. AAdvantage Laundry Systems carries verified parts for every code in this database.

• Door interlock switch
• Pressure switch
• Balance ring
• Suspension rod

Diagnostic Test Mode

Enter Samsung diagnostic test mode: Press and hold the 'Spin' and 'Soil Level' buttons simultaneously while powering on the washer.

Skill Level & Repair Time

This repair is appropriate for an experienced laundromat owner or in-house technician. You should be comfortable removing service panels, reading wiring diagrams, and using a multimeter to test continuity and voltage. Plan for approximately 30 minutes of active repair time once parts are on hand.

Get AI-Powered Diagnosis

If the steps above don't resolve Samsung UB, run a free Service Guy AI diagnosis. Upload a photo of the error display and get an AI-generated repair plan tied to your exact Samsung model number, including supplier links for required parts and on-call technician escalation.

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