LG LRE30451 Service page 62

Main oven sensing error
Check for loose connector.
(Front) (main PCB CN6)
CN6
Inspect connector pin solder of CN6 (Back) (main PCB CN6)
F-CODE FLOW CHART
F-3, F-4 error
and look for harness terminals damaged or not
Remove the main PCB (009A) harness
and pull the PCB (009A) forward from the PCB case
Back
CN6 CN6 CN6 CN6 CN6
CN6 CN6 CN6 CN6
CN6 CN6
CN6 CN6 CN6 CN6 CN6 CN6
CN6 CN6
CN6 CN6
CN6 CN6 CN6 CN6
CN6 CN6 CN6 CN6 CN6
Repair and fix
Yes
Check for loose connector.
(main PCB CN6)
No
Normal?
Yes
※ If pin solder is cracked,
repair and re-use
No
Cracked?
Yes
END
7-6
Reconnect and
replace the bad harness
END
Replace
END