LG LFC20770SW - 6) Poor cooling in Freezer section.

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5
1-. Check continuity between Duct
Assembly receptacle and CON4
connector.
No Checking flow Result & SVC Action
6
1-. Connect CON4 to Main PCB.
2-. Connect Duct assembly with
receptacle.
3-. Execute TEST MODE #1 and check
damper status.
4-. Execute TEST MODE #2 and check
damper status.
Result SVC Action
TEST
MODE #1
Damper
Opened
Check TEST MODE #2 condition.
Damper
Closed
Replace Main PCB
TEST
MODE #2
Damper
Opened
Replace Main PCB
Damper
Closed
Go to step #7
Result SVC Action
Continuity in all wires Go to step #6
No Continuity in any wire Replace refrigerator unit
<Damper Opened> <Damper Closed>