Error code · Washer

Samsung Washer Code AC4 / AE4: Wi-Fi Module Link

Medium · inspection needed

Code: AC4 / AE4
Appliance: Washer
Brand: Samsung
Warranty: 30-day workmanship

What AC4 / AE4 means

On Samsung WF45-series front-load washers, AC4 or AE4 means the Wi-Fi module is not answering the main control board. Models that use this table include the WF45M5500A, WF455ARGSGR/A2, and the WD53DBA900HZA1 combo. The washer can stop with the code on the display because the main board does not sense the module. This is a communication problem between two boards rather than a water or drum issue, so the load itself is not the cause.

Common causes of AC4 / AE4

Wi-Fi module connector on the main board
Wiring between the module and the main board
Solder joints on the module board
Main board communication circuit

✓ One safe check you can try

1. Power the washer down for two to three minutes. 2. Power it up and try the cycle once more. 3. Check that the washer has a steady power connection and that the outlet is not shared with a heavy appliance. 4. If AC4 or AE4 returns, schedule a visit and leave the cabinet closed.

! Why to stop there

A restart cannot show whether the Wi-Fi module or the link to it is the weak point.
We inspect the module connector and soldering on the control side and test the harness.
We confirm the washer runs normally once the link is restored before closing the job.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Washer codes

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AC4 / AE4AC4 / AE4 questions

Does AC4 mean my Wi-Fi network is down?

No. The code is about the module inside the washer talking to its own main board, not about your home network. Your router being off will not cause it.

Can I run the washer without Wi-Fi?

The code usually stops the cycle, so the washer will not run until the link is restored. A restart may clear it briefly, but a repeat needs testing.

Is AE4 different from AC4?

They describe the same condition on these washers. The letters differ only by how the display shows the character, so we treat them together. Telling us which one you see still helps us.

Book a visit

Still seeing AC4 / AE4?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 561-5298