Match the symptom, then work through the safe checks.
1. What best matches what you observe?
2. Complete only the checks that are safe for you.
Show stop conditions
- Motors or heaters run unexpectedly
- The appliance contains water or a load
- Undocumented settings would be changed
Likely causes
- A setup, delay, test, or interrupted state is active
- A button combination changed the operating mode
- Cycle or setup was not completed
- Control did not return to normal mode
Quick checks, in order
Read the display as a status first
Not every code is a hardware failure.
Use the documented cancel sequence
Follow the model manual only.
Disconnect power briefly if allowed
Confirm the normal home screen returns.
Avoid undocumented service modes
They can run heaters, pumps, or motors unexpectedly.
What happens when A0 appears?
No further action is usually needed.
A stuck button or control fault may be involved.
Disconnect power and arrange service.
Stop and get qualified help when
- Motors or heaters run unexpectedly
- The appliance contains water or a load
- Undocumented settings would be changed
Official support and model manuals
Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.
Frequently asked questions
What does A0 mean on a Samsung washer?
On many model families, A0 indicates that the washer is in a test-related mode. Confirm the exact model and region because the same display can be used differently.
Can I clear A0 by unplugging the washer?
A short power reset may clear a temporary state, but it will not fix a blocked hose, leak, failed sensor, motor, heater, or wiring fault. Stop if the code returns.
Should I replace a part based only on the code?
No. A code identifies a system or condition, not always the failed component. Complete safe external checks and use the model-specific manual or qualified service.