LG LRE30453SW Service Manual page 58

F-CODE FLOW CHART
Oven too hot error F-9 error
Code Error mode Operation Times/sampling
F-9 Oven hot Oven temperature is over 650˚F During cook
continuously during 2 minutes on cooking. (Not self clean mode)
Oven is too hot (F-9)
Disconnect power / Remove the
oven relay PCB(012B) harness and pull the
oven relay PCB(012B) forward from case
Check for a welded bake relay.
(measure the resistance)
Welded Normal
Continuity Infinite
No
Normal?
Replace
the oven relay PCB
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