WM2140CW - LG Washing Machine Service Manual (repair manual). Page 26

NO

YES

YES

YES

YES

NO

NO

NO

NO

YES

YES

NO

BL

WH

WH

WH

WH

RD

BL

BL

BL

OR

21

RD

BL

2 1

BL

WH

WH

WH

WH

RD

BL

BL

BL

OR

21

RD

BL

2 1

Replace the
SENSOR SWITCH
ASSEMBLY.

Replace the MAIN PWB
ASSEMBLY.

Repair the DRAIN HOSE 
ASSEMBLY.

Remove foreign material.

Reconnect or repair the
connector

Replace the DRAIN
PUMP ASSEMBLY.

Replace the MAIN PWB 
ASSEMBLY.

When pressing SPIN SPEED and SOIL LEVEL at the
same time after draining, is  the water level frequency
255?  
When pressing SPIN SPEED and SOIL LEVEL buttons
at the same time while washing, is the water level
frequency between 230 - 243 ?

Check the voltage between two pins while pressing
the POWER button. Is the voltage  120 V AC?

Is the drain hose twisted or frozen?

Is the impeller of the drain pump clogged?

Is the connector disconnected, disassembled?

Is the coil of the drain pump too high or low?
(resistance of the coil is 10-20 

Ω)

When checking voltage between connectors during

spin, is the voltage 120 V AC as in the figure?