LG LFX25974 Series Service Manual page 26

8-5 Defrost Heater Error (Er dH)
No
1 Check the Door gasket.
2 Check the Defrost control part.
3 Input Test 3 Mode.
(Push the button 3 times)
4 Check the Blue(Pin4) to Orange(Pin9) at
CON3 on the main PCB
<CON3>
5 Release the test mode.
push the button 1 times. (normal)
6 Check the Blue(Pin4) to Orange(Pin9) at
CON3 on the main PCB
<CON3>
Checking flow
Def'
Fust
Sensor
M
Def' Heater
Result & SVC Action
Part Result
0 Ω
Fuse-M
Other
34~42 Ω
Defrost
Other
Heater
0 Ω
Defrost
OFF
Sensor
Result
112 ~ 116 V
0 V
Result
0 V
112 ~ 116 V
- 26 -
SVC Action
Go to the 3
Change Controller Assembly
(Position No.400A )
Go to the 3
Change Controller Assembly
(Position No.400A )
Go to the 3
Replace product
SVC Action
Go to the 5
Replace Main PCB
SVC Action
Explain to customer
Replace Main PCB