The 26E error on your Samsung Washer means the machine has detected a communication fault between the main control board and the sub control board (often linked to the water heating or drain sensor circuit). This usually needs a power reset first, followed by a check of internal wiring connections if the code returns.

Error code 26E
Meaning Communication error between main PCB and sub PCB, or a faulty sensor circuit reporting bad data
Severity Medium — washer will usually stop mid-cycle but is not dangerous to leave overnight
Time to fix 10–40 minutes
Tools needed Phillips screwdriver, multimeter (optional, for wiring checks)

What the 26E error means

Samsung washers use two control boards that constantly send signals to each other — one manages the main wash functions, the other handles secondary components like the drain pump or heater. When the 26E code appears, the main board hasn’t received the expected reply from the sub board within its normal window, so it halts the cycle as a safety measure.

This is different from sensor-specific codes like the one covered in our Samsung Washer SE Error Code: Causes and Fixes guide, though the underlying cause can sometimes overlap when wiring harnesses are shared between components.

Common causes

  • Loose or corroded wiring connector between the main and sub control boards
  • A power surge or brief outage that disrupted communication mid-cycle
  • Failed or failing sub control board
  • Moisture ingress near the control board housing, especially in older units
  • Faulty main control board unable to send or read signals correctly
  • A firmware glitch that clears itself after a full reset

How to fix the 26E error

  1. Power cycle the washer — Unplug the machine for 2–3 minutes, or switch off the breaker if it’s hardwired. This clears temporary communication glitches and is the fix that works most often.
  2. Check the door and start again — Close the door firmly, select a cycle, and press start. If 26E disappears, it was likely a one-off signal error.
  3. Inspect the wiring harness — With the washer unplugged, remove the rear or top panel and check the ribbon cable and connectors between the main and sub PCBs for looseness, corrosion, or pinched wires.
  4. Reseat all connectors — Firmly push each connector back into place. A loose pin is one of the most common causes of intermittent board communication faults.
  5. Test for moisture damage — Look for water staining or corrosion on either control board. If found, the board will likely need replacing rather than repairing.
  6. Call a technician if the code persists — If the error returns after a reset and the wiring looks fine, the sub or main control board may need professional replacement, similar to troubleshooting steps used for the Samsung Washer TE Error Code: Causes and Fixes.

FAQ

Can I keep using the washer if 26E keeps coming back?
It’s best not to. Repeated communication errors can leave a cycle stuck mid-wash, sometimes with water still in the drum, so get it checked before running more loads.

Does a power cut cause the 26E error?
Yes, a brief power interruption during a cycle is one of the most common triggers, and a simple reset usually clears it.

Is this the same as the DE or LE door and leak codes?
No. The 26E code is a board communication fault, while codes covered in our Samsung Washer DE Error Code: Causes and Fixes and Samsung Washer LE Error Code: Causes and Fixes guides relate to door locks and water leak sensors instead.