LG LSSB2691ST Service Manual page 50

TROUBLESHOOTING
3. Troubleshooting With Error Display
18) Poor cooling in Freezer compartment
No
5
Check the Fan motor.
Rotate fan using your hand.
it feel sticky, change the motor.
(cause of ice or rust inside of motor)
6 Check the Fan motor voltage.
Pin17(2), Pin18(3), Pin 20(1) of CON8.
CON 8
Checking flow Result & SVC Action
Point
Motor
Point
(1)~(2)
(2)~(3)
50
Result
SVC Action
Sticky Change the motor
Result
SVC Action
Below 12V Change the PCB
0 or 5V Change the motor