The E-93 error on your Samsung Washer means the main control board has lost communication with the sub control board or display module. This is usually caused by a loose wiring connection or a faulty control board, and it can often be fixed with a simple power reset.

Error code E-93
Meaning Communication failure between the main PCB and sub PCB/display panel
Severity Medium — the washer will not start a cycle until resolved
Time to fix 10–40 minutes
Tools needed Screwdriver, multimeter (for wiring checks)

What the E-93 error means

Samsung washers use two circuit boards that talk to each other constantly: the main control board (which runs the wash cycle) and the sub control board or display module (which shows settings and takes button input). The E-93 code appears when these two boards stop communicating properly.

This is a wiring or electronics fault rather than a water, drain, or drum problem. The machine flags it as a safety measure so it doesn’t run a cycle without full control over its functions. It’s similar in nature to other communication faults covered in the Samsung Washer SE Error Code: Causes and Fixes guide, where a signal disruption between components triggers a stop.

Common causes

  • Loose or partially disconnected wiring harness between the main and sub PCB
  • A ribbon cable or connector that has vibrated loose during a wash cycle
  • Moisture or condensation inside the control panel housing causing a poor connection
  • A power surge or brief outage that corrupted the communication signal
  • A failing main control board or sub control board
  • Corroded or oxidised connector pins from age or humidity

How to fix the E-93 error

  1. Power cycle the washer: Unplug the machine (or switch off at the wall) for 2–3 minutes, then plug it back in. This clears temporary communication glitches and is worth trying first.
  2. Check the control panel for moisture: Open the top panel or console cover and look for condensation or dampness near the boards. Dry thoroughly before reconnecting power.
  3. Inspect the wiring harness: With the machine unplugged, remove the control panel cover and check the connectors linking the main and sub PCBs. Reseat any loose plugs firmly.
  4. Test continuity with a multimeter: Check the ribbon cable or wiring harness for continuity. A broken wire inside the insulation won’t always be visible, so testing is more reliable than a visual check.
  5. Clean connector pins: If pins look discoloured or corroded, gently clean them with an electronics-safe contact cleaner and reconnect.
  6. Replace the faulty board: If wiring checks out fine and the error persists after a reset, the main or sub control board itself has likely failed and will need replacing by a qualified technician.

FAQ

Can I keep using the washer with an E-93 error showing?
No. The washer typically won’t start a cycle while this error is active, since it needs both boards communicating to run safely.

Does a power reset permanently fix E-93?
Sometimes. If the cause was a temporary glitch or power surge, a reset clears it. If it returns after a few cycles, the issue is more likely a wiring or board fault, similar to the pattern seen with the Samsung Washer TE Error Code: Causes and Fixes.

Is this an expensive repair?
It varies. A loose connector costs nothing to fix yourself, but a replacement control board can be one of the pricier washer parts, so it’s worth checking wiring thoroughly before assuming a board replacement is needed.