LF708C, LF711C - LG Washing Machine Service Manual (repair manual). Page 23

Replace the sensor 

(pressure)

Replace the PWB

assembly (Main)

Repair drain hose

Remove foreign material.

Reconnect or repair the
connector

Replace the pump
assembly

Replace the PWB

assembly (Main) 

When pressing [Spin] and [Temp.] at the same time after
draining, is  the water level frequency 252 or more?  
When pressing  [Spin], [Temp.] buttons at the same time
while wash, is the water level frequency between 
240?

Checking voltage between two pins as press the
power button is the voltage 240V~?

Is the drain hose twisted or frozen?

Is the impeller of the drain pump clogged?

Is the connector disconnected, disassembled?

Is the coil of drain pump cut-off?

(resistance of coil is 90~160Ω)

When checking voltage between connectors

( ,  )on spinning, is the voltage 240V~ 

as the figure?