LG LFC20770SW - 5) Over cooling in refrigerator section.

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4) Poor cooling in refrigerator section.
1
1-. Execute TEST MODE #1.
2-. Press and Hold Refrigerator door
switch (both).
3-. Check for air flow trough Duct
assembly.
No Checking flow Result & SVC Action
2
1-. Unplug CON4 from Main PCB.
2-. Check resistance value between Red
& Yellow Wires.
3-. Check resistance value between Blue
& White wires.
Result SVC Action
Wind Go to step #6
No Wind Go to step #2
Result SVC Action
373.5~456.5Ù Go to step #6
Other Value Go to step #3
BA
NOTE: Measurement “A” and “B” must be within
spec, If “A” or “B” are not mach with the spec,
consider it as “Other Value” condition.