F1252RD2 - LG Washing Machine Service Manual (repair manual). Page 24

When pressing Rinse and Spin at the same
time after draining, is the water level frequency 255?
When pressing Rinse and Spin buttons 
at the same time while washing, is the water level 
frequency between 239 - 250 ?

Check the voltage between two pins while pressing
the POWER button. Is the voltage 220-240V 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 220-240V AC as in the figure?

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.