LG LRG3091ST Service Manual page 75

CHECKING FLOW CHART BY FAILURE
Main oven sensing error
Yes
Check the looseness of connector (Power PCB
CN04) and look for harness terminal damage
Normal?
Yes
Connect the power
Check the value of thermistor by using the test mode
※ To enter the test mode, follow these steps:
1. press the "clear" key
2. press the "BAKE", "BROIL" key at the same time for one second
failure code display mode
3. press the "BAKE", "BROIL" key at the same time again.
S/W version and model option display mode
4. press the "COOK TIME" key
It show the display from step1 to step3 alternately each two seconds
TIMER
DELAY
TIMED
BAKE BROIL WARM
STEP 1
F-1, F-2 error
No
HR HR
CLEAN LOCKED
Reconnect and replace
the bad harness
END
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