LG LSSB2691ST Service Manual page 37

TROUBLESHOOTING
2. Troubleshooting With Error Display
6) Defrost Heater Error(F dH)
No
1
Check the Door gasket.
Check the Defrost control part.
2
Fuse M
Input Test 2 Mode
3
(Push the button 2 times)
Check the Brown to Blue&White.
4
Release the test mode.
5
Push the button 1 times. (normal)
6
Check the Brown to Blue&White.
Checking flow
Def' sensor
Def' Heater
CON 3
CON 3
Result & SVC Action
Part
Fuse-M
Def' Heater
Def' sensor
Result
100 ~ 127V
0V
Result
0V
100 ~ 127V
37
Result
SVC Action
0
Go to the 3
Other
Change Fuse_M
34~42
Go to the 3
Other Change Fuse_M
0
Go to the 3
Replace product
SVC Action
Go to the 5
SVC Action
Explain to customer