Online Training Manual for LG Products - Damper(s)
The damper itself is not repairable. The following test procedures will allow the technician to determine whether the fault is with the damper or the main control board.
The stepping motors for the dampers are wired with four connections; the blue and red control the A coil, and white and yellow control the B coil.
There are two damper motors; one to control the flow of cold air into the refrigerator compartment and one to control the flow of cold air into the pantry, excluding the crisper and vegetable drawers. Air flow throughout the crisper drawers is controlled by opening or closing the vents on the drawers.
The dampers are controlled by a stepping motor. Every time the refrigerator is powered up, the motors seek their home position so they can adjust properly.
The refrigerator damper has a 4-pin connector.
Check the resistance across the red and yellow terminals.
It should be 415 ohms ± 10%.
Check the resistance across the blue and white terminals.
It should be 415 ohms ± 10%.
The pantry damper has a 6-pin connector. The wire colors are arranged differently but work the same way. The two additional brown wires are for the temperature sensor in the pantry. You can check the resistance of the pantry sensor from this connector.
The resistances are the same as above, even though the wire colors are in different positions.
Check the resistance across the red and yellow terminals.
It should be 415 ohms ± 10%.
Check the resistance across the blue and white terminals.
It should be 415 ohms ± 10%.
To check the sensor, read across the brown terminals.
The pantry damper has a control panel of its own to allow independent adjustment of the temperature in it. This drawer can be kept colder or warmer than the remainder of the refrigerator.
The pantry drawer runs across the entire width of the refrigerator compartment and can be used for meats, deli items, party trays, et al.
When the refrigerator is set to the default settings (Freezer 0° F or -18° C; Refrigerator 37° F or 2.7° C), the temperature of the pantry drawer is kept around 34° F (1° C) and is suitable for the storage of meats or fish.
When the refrigerator is set to the default settings (Freezer 0° F or -18° C; Refrigerator 37° F or 2.7° C), the temperature of the pantry drawer is kept around 38° F (3.3° C) and is suitable for the storage of fresh foods.
When the refrigerator is set to the default settings (Freezer 0° F or -18° C; Refrigerator 37° F or 2.7° C), the temperature of the pantry drawer is kept around 41° F (5° C) and is suitable for the storage of fresh foods for a longer time without allowing frost or ice to form on fresh vegetables and other items.
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