LG LRGL5821S Service Manual page 58

CHECKING FLOW CHART BY FAILURE
Oven too hot error  F-6 error
2
Is the resistance of
thermistor normal?
Check :
Pin 1 and 2 of CN10 of Main PCB
Normal – approximately 0.6~1K ohm at 25℃
3
Replace the Thermistor
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Only training and service purposes
No
CN10
1
2
Yes
10-14
Replace the Main PCB