LG LRG3061ST Service Manual page 61

CHECKING FLOW CHART BY FAILURE
Oven too hot error M F-6 error
Check the broil relay damage
(measure the resistance)
NO NO
COM COM
Replace the main PCB
No
Normal?
Yes
Welded
Continuity
No
Normal?
Yes
END
10-15
Replace the power PCB
Normal
Infinite
Replace the power PCB
END
END