Heating Without Water - LG WM3431H Series Service Manual

AC120V

HEATING WITHOUT WATER

When pressing Wash/Rinse and Spin Speed at
the same time after draining, is the water level
frequency 255?
When pressing and Spin Speed 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?
D R A I N M A L F U N C T I O N I N G
Is the drain hose twisted or frozen?
Is the impeller of the drain pump clogged?
Is the connector disconnected or disassembled.
Is the resistance of the drain pump coil 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?
22
Replace the
SENSOR SWITCH
ASSEMBLY.
Replace the MAIN PWB
ASSEMBLY
Repair the DRAIN HOSE
ASSEMBLY.
Remove foreign material.
Reconnect or repair the
connector
Repair the DRAIN PUMP
ASSEMBLY.
Repair the MAIN PWB
ASSEMBLY.