LG LFCS27596S Service Manual page 61

Over cooling in Freezer compartment
1
Check the sensor resistance.
CON7
th th
17 pin ~ 20 pin
-22ºF / -30ºC
-13ºF / -25ºC
-4ºF / -20ºC
-13ºF / -25ºC
14ºF / -10ºC
23ºF / -5ºC
32ºF / 0ºC
2 Check the air flow in test
mode 1 & 3
(Push the button 1 or 3 time)
Test1 Air Flow
Test3 No Air Flow
NG
Resistance [Ω]
40k
30k
23k
17k
13k
10k
8k
Explain to
customer
OK
3
Check the Fan motor.
Rotate fan using hand.
It feel sticky?
Fan Motor
No
4
Change the Main PCB
Change the
Yes
Fan motor