Error code reference

Samsung Washer Error Code AC

Communication error: signals between the sub and main PBAs are not sensed due to communication error, incorrect or loose connections, faulty soldering on sub PBA.

SourceSamsung Washer - Service Manual: WF45K6500/WF45K6200 Seriesp. 26, 30

Diagnostic procedure

The full AC procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check the connector connections between the sub and main PBAs; check for incorrect or loose connections; remove sub PBA C/Panel and check for faulty soldering.

SourceSamsung Washer - Service Manual: WF45K6500/WF45K6200 Seriesp. 26, 30

More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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