LG LRG3061ST Service Manual page 54

NO
COM
CHECKING FLOW CHART BY FAILURE
Oven does not heat
Normal?
Yes
Check the oven sensor
(measure the resistance after cooling down)
Normal: approximately 1.06 kΩ at 65F
~ 1.12 kΩ at 85F.
Normal?
Yes
Replace the power PCB
Normal?
Yes
END
No
No
No
10-8
Replace the Failed Valve
END
Replace the oven sensor
END
Replace the main PCB
END