LG LRGL5821S Service Manual page 52

CHECKING FLOW CHART BY FAILURE
Unplug the unit
4
Is the resistance of thermistor normal?
Check
Pin 1 and 2 of CN10 in main PCB.
Normal – approximately 0.6~1K ohm at 25℃.
CN10
5
Replace the Main PCB
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Only training and service purposes
No
Yes
10-8
Replace the defective
Thermistor