LG W3S1 Series Service Manual page 26

 Test 3 Motor Test
Caution
Trouble Symptom
Measurement
Condition
Before measuring resistance, be sure to turn the power off and discharge voltage.
(When discharging, contact the metal plug of power cord with the ground.)
Drum dose not rotate; no blower function, no heater function.
Turn the dryer's power off, then measure resistance.
Is resistance below 3 between connector
BL2- ① (White wire) and WH4- ③ (Brown wire)?
※ Measure while door is closed.
Is resistance below 3 between connector
BL2- ① (White wire) and WH4- ① (Yellow wire)?
※ Measure while door is closed.
Is resistance below 3 between connector WH4- ①
(Yellow wire) and WH4- ③ (Brown wire)?
Is resistance below1 between terminals of outlet
thermostat attached to blower housing?
Does idle switch attached to motor bracket operate
level by drum belt?
(Not operating lever is normal.)
Is resistance below 1 between idler switch
terminals?
• Check motor. (Refer to 'motor diagram & check')
• Check if control connector is contacted.
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• Replace control.
(Relay check)
• Check controller
connector.
• Check if door frame
presses door switch
knob.
• Check door switch.
Check harness
connection.
• Replace control.
(Relay check)
• Check controller
connector.
• Replace outlet
• Thermostat.
(Refer to
'component')
• Check idler
assembly.
• Drum belt cuts off
• Drum belt takes off
from motor pulley.
• Replace idler
switch.