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Heating Without Water; Drain Malfunction - LG WM3677HW Service Manual

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HEATING WITHOUT WATER

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

DRAIN MALFUNCTION

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?
NO
NO
NO
NO
26
Replace the
NO
SENSOR SWITCH
ASSEMBLY.
Replace the MAIN PWB
YES
ASSEMBLY.
YES
Repair the DRAIN HOSE
ASSEMBLY.
YES
Remove foreign material.
Reconnect or repair the
YES
connector
Replace the DRAIN
YES
PUMP ASSEMBLY.
NO
Replace the MAIN PWB
ASSEMBLY.

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