Seeing **AC3** on a Samsung washing machine narrows the problem to **communication / electronic control error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. Samsung uses overlapping code conventions across model years and regions. This page keeps the appliance context attached to the code so a same-looking string from another product family is not misapplied. The recorded display form is **AC3**. Search normalization stores it as **AC3** 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 codeAC3
ApplianceWasher
Quick answer
Communication / electronic control error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so AC3 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
Seeing **AC3** on a Samsung washing machine narrows the problem to **communication / electronic control error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. Samsung uses overlapping code conventions across model years and regions. This page keeps the appliance context attached to the code so a same-looking string from another product family is not misapplied. The recorded display form is **AC3**. Search normalization stores it as **AC3** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
While AC3 is active, the appliance may lose communication between control boards, display, inverter, or other electronic modules.
On affected Samsung washing machine models, controls can become unresponsive, a feature can stop, or the code may appear after power-up.
On affected Samsung washing machine models, intermittent operation can occur if a connection or power condition is unstable.
Depending on the exact model, aC3 appears during the washer stage associated with communication / electronic control error.
Depending on the exact model, the cycle can pause, stop, retry, drain, or refuse to advance until the condition is cleared.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Communication / electronic control error
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
As an external check for AC3, power the appliance off once using the documented method, then restore power and see whether the code returns.
With AC3 recorded, record whether the issue followed an outage, update, move, or service event.
With AC3 recorded, do not reseat internal live connectors unless qualified to follow the exact service procedure.
Before opening any service area, record the code and the cycle stage where it appears.
Before opening any service area, verify owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
Before opening any service area, power-cycle once only where Samsung's guidance recommends it; if the same code returns, 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. For AC3, stop troubleshooting immediately if the symptom crosses into a safety hazard rather than a normal diagnostic condition.
Get help
When to request repair service
For AC3, the service threshold is straightforward: A returning communication/electronic-control code can require harness, connector, board power-supply, firmware, or module testing. Bring the exact model number and a photo of the display so the diagnosis stays tied to the documented Samsung code.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You can try the one reset Samsung documents for the model, but **AC3** returning afterward means the condition still exists. Note the operating stage instead of cycling power repeatedly.
That depends on the accompanying symptom. A code with no safety hazard may allow a short diagnostic check, but **AC3** should not be ignored if performance is deteriorating or the display keeps returning.
The code alone is not enough to justify a part. **AC3** should narrow testing to the affected function; the final cause still has to be verified on the exact model.
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 AC3** separate from same-looking codes used by other Samsung appliance families.
