LG LFXS29766 Series Service Manual page 38

Defrost Heater Error (F dH)
1
Check the Door gasket .
Is door gasket damaged?
No
2
Is the input voltagte 112~116V?
Yes
3
Check the Defrost control part.
Is Defrost Sensor resistance
22kΩ↑ or OFF?
22kΩ↑
4
Replace the
Yes
Check the Heater Voltage.
Door gasket
Is voltage 112~116V?
Change the
source
No
to 112~116V
5
Check the Heater Voltage.
Is voltage 0V?
Replace
OFF
product
- 38 -
Input Test 3 Mode
(Push the button 3 times)
TEST MODE 3 Voltage [V]
CON3
112V ~ 116V
6 th 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