40776 - LG Washing Machine Service Manual (repair manual). Page 27

NO

YES

YES

YES

YES

NO

NO

NO

NO

YES

YES

NO

SB

SB

BL

YL

BL

BL

YL

WH

WH

WH

WH

WH

SB

RD

RD

BL

RD

YL

BK

BK

WH

SB

SB

SB

BL

YL

BL

BL

YL

WH

WH

WH

WH

WH

SB

RD

RD

BL

RD

YL

BK

BK

WH

SB

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 WARM/COLD and LOW at the same
time after draining, is  the water level frequency 255?  
When pressing WARM/COLD and LOW 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?