LG LRGL5821S Service Manual page 55

CHECKING FLOW CHART BY FAILURE
Main oven sensing error  F-1, F-2 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℃
CN10
3
Replace the Main PCB
No
2
1
Yes
Replace the defective
Thermistor
10-11
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