LG Washer Error Code E-31

E-31 on an LG washer indicates a weight sensor open circuit error. The control board has detected that the sensor's signal output exceeded the expected HEX value of FF for more than 5 seconds. This means the machine cannot read the drum load correctly and has flagged a fault. The issue typically points to a disconnected connector, damaged wiring, or a failed weight sensor.

It is not recommended to continue running the washer while the E-31 error is active. Without a functioning weight sensor, the machine cannot properly calibrate water fill levels or spin cycles, which could lead to poor wash results or mechanical stress on components. Resolving the fault before resuming normal use is the safer approach.

A reset may temporarily clear the E-31 code, but the error will return if the underlying fault is not corrected. To reset, unplug the washer for a few minutes and then plug it back in. If the sensor connection or component is still faulty, the HEX value will exceed FF again during the next cycle and the error will reappear.

In many cases, yes. Start by unplugging the washer and inspecting the weight sensor connector at both the sensor housing and the main PCB for looseness, corrosion, or damage. If the connector is simply loose, reseating it may resolve the error. If the wiring or sensor itself has failed, those parts will need to be replaced, which may require more technical comfort with appliance repair.

If the fix is simply reseating a loose connector, there may be no parts cost at all, only your time. If the weight sensor needs replacement, parts typically range from $20 to $60 depending on the model. If the wiring harness or main PCB is involved, repair costs can range from $80 to $250 or more including labor if a technician is needed.