LG LFX25992ST Service Manual page 36

8-7 Defrost Heater Error (R dH)
No
1 Check the Door gasket.
2 Check the Defrost control part.
Heater
3 Input Test 3 Mode.
(Push the button 3 times)
4 Check the Blue to Yellow.
<CON3>
5 Release the test mode.
push the button 1 times. (normal)
6 Check the Blue to Yellow.
<CON3>
Checking flow
Def'
Def'
Heater
Fuse
M
Result & SVC Action
Part
Fuse-M
Def'
34~42
Heater
22
Def'
Sensor
Result
112 ~ 116 V
0 V
Result
0 V
112 ~ 116 V
- 36 -
Result SVC Action
Go to the 3
0
Change Fuse-M
Go to the 3
Change Fuse-M
Go to the 3
Replace product
OFF
SVC Action
Go to the 5
Replace Main PCB
SVC Action
Explain to customer
Replace Main PCB