Lg Refrigerator Error Code: gF / 9F

This code shows that the water pressure is low. Additionally, the code may also indicate that the flow sensor is malfunctioning.

Solution

First check your water pressure. If it is below 20 psi, then, you will need to increase it. Nonetheless, the optimum water pressure is between 40 and 120 psi.

Alternatively

Is the ice maker overfilling with water?
If yes, then, the flow sensor (determines how much water flows to the ice maker) is faulty. Consequently, you will need to get a replacement flow sensor.