LG LFX31995ST Training Manual page 95

Sensors
LFX31995ST Refrigerator
Temperature Sensors
Refrigerator sensor is located on the Main LED light assembly at the
upper center of the refrigerator ceiling. The sensor is provided with 5Vdc
from the Main Power control Board (PCB) at Con 7 between WH & WH.
With a return voltage of 2.52Vdc at 37°F.
Refrigerator sensor is used to control the refrigerator temperature by
sending signals to the PCB which will energize the refrigerator fan motor
and compressor to maintain set temperature.
Freezer Sensor
Freezer sensor is located on the freezer evaporator cover at the upper
R.H. corner. The sensor is provided with 5Vdc from the main PCB at
Con 7 between BL & BL with a return voltage of 2.72Vdc at 0° F.
Freezer sensor is used to control the freezer temperature by sending
signals to PCB which will energize the freezer fan and compressor to
maintain set temperature.
Note: See sensor charts on pages 97 & 98 of this manual for
Voltage and Ohm readings at different temperatures.
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