LG LFXS29626 Series Service Manual page 33

Defrost Heater Error (F dH)
1
Check the Door gasket .
Is door gasket damaged?
No
2
Check the Defrost control part.
(1) Is Fuse-M resistance 0Ω?
(2) Is Def Heater resistance
35~40Ω?
Fuse-M
Def Sensor
Def Heater
Yes
3
Check the Defrost control part.
Is Defrost Sensor resistance
22kΩ↑ or OFF?
Fuse-M
Def Sensor
Def Heater
22kΩ↑
4
Replace the
Yes
Check the Heater Voltage.
Door gasket
Is voltage 112~116V?
Change
Fuse-M
No
Def Heater
5
Check the Heater Voltage.
Is voltage 0V?
Replace
OFF
product
6
Explain to customer
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Input Test 3 Mode
(Push the button 3 times)
TEST MODE 3 Voltage [V]
CON3
112V ~ 116V
6 h pin ~ 10 th pin
Yes
Input Test 1 Mode
(Push the button 1 times)
TEST MODE 1 Voltage [V]
CON3
6 th pin 10 th pin
Yes
Replace
Yes
Main PCB
Replace
No
Main PCB
0V