LG DLE4970 E Series Service Manual page 27

Test 6
Heater Switch Test - Electric Type
Caution
Trouble Symptom
Measurement Condition
L2D(White)
TH3
TH2
L2
(Red)
L2S(White)
TH3
TH2
L2(Red) L2S(White)
Wires
• L2(Red)
• L2D(White) : Go to the duct
(YL3 in main pcb
• L2S(White) : Go to the
safety.
Before measuring resistance, be sure to turn power off, and do voltage discharge.
(When discharging, contact the metal plug of power cord with earth line.)
While operating, heating will not work.
Drying time takes longer.
After turning power off, measure the resistance.
1. Is resistance between heater terminal
and below 18 ~ 22Ω?
2. Is resistance between heater terminal
and below 18 ~ 22Ω?
3. Is resistance between heater terminal
and below 9 ~ 11Ω?
Check if the value of measured resistance is
below 1Ω between terminal TH2 (Safety thermostat).
Check if the value of measured resistance is below
1Ω between terminal TH3 (HI-Limit thermostat).
Check motor. Check if the value of measured
resistance is below 1Ω between terminal
and at RUN condition.
Check controller.
Check Harness-linking connector.
YES
YES
YES
YES
27
27
NO
• Replace heater.
• Replace TH2
(Safety
NO
thermostat) and
TH3 (Hi-Limit
thermostat)
• Replace TH2
NO
(Safety
thermostat) and
TH3 (Hi-Limit
thermostat)
• Check motor and
NO
replace it.