The E-31 error on your Samsung Washer means the machine has detected a problem with the water level (pressure) sensor circuit. This often causes the washer to stop mid-cycle or refuse to fill properly, and it usually needs a quick inspection before you run another load.

Error code E-31
Meaning Water level/pressure sensor fault detected by the main control board
Severity Medium — the washer usually won’t complete a cycle until this is fixed
Time to fix 15–40 minutes
Tools needed Multimeter (optional), flat-head screwdriver

What the E-31 error means

Samsung washers use a pressure sensor (sometimes called a water level sensor) to monitor how much water is in the drum. When this sensor sends an unusual or missing signal to the main control board, the machine throws the E-31 code as a safety measure. This is different from drainage-related codes like the one covered in Samsung Washer DE Error Code: Causes and Fixes, since E-31 is about detecting water level rather than moving water in or out.

In most cases, the sensor itself is fine but a loose connection, a kinked air hose, or a small tear in the pressure tube is confusing the reading. Less often, the sensor or control board has actually failed.

Common causes

  • Pressure sensor hose disconnected, pinched, or cracked
  • Loose or corroded wiring connector at the sensor or control board
  • Small amount of water or debris trapped in the pressure hose
  • Faulty pressure sensor (water level switch)
  • Main control board misreading the sensor signal
  • Power surge or brief electrical fault resetting sensor calibration

How to fix the E-31 error

  1. Power cycle the washer: Unplug it for 60 seconds, then plug it back in. This clears many one-off sensor glitches.
  2. Check the pressure hose: Locate the small plastic hose running from the tub to the pressure sensor (usually near the top of the machine). Make sure it’s firmly attached at both ends and not kinked or split.
  3. Clear blockages in the hose: Disconnect the hose carefully and blow through it gently to clear any trapped water, lint, or debris, then reconnect it securely.
  4. Inspect the sensor wiring: With the washer unplugged, check the connector at the pressure sensor and control board for corrosion or looseness. Reseat the connector firmly.
  5. Test the pressure sensor: If you have a multimeter and basic wiring knowledge, check the sensor’s resistance against the manufacturer’s spec. Replace it if it’s out of range.
  6. Call a technician if the error persists: If the code returns after these checks, the control board itself may need diagnosis or replacement — this is best left to a qualified appliance repair engineer.

FAQ

Can I still run a wash cycle with the E-31 error showing?
Usually not — the washer will typically pause or stop filling once this code appears, so it’s best to address it before starting another load.

Is E-31 the same as a water level sensor code on other Samsung models?
Yes, though the exact code can vary slightly by model. It’s unrelated to communication faults like those in Samsung Washer SE Error Code: Causes and Fixes or door lock issues covered in Samsung Washer LE Error Code: Causes and Fixes.

Do I need a professional to fix this?
Not always. Checking and reseating the pressure hose and connectors is a simple DIY step. If that doesn’t resolve it, a professional should test the sensor and control board.