As a general rule, first ensure that it’s getting power by testing the wall outlet with another device. Then check that the temperature is on the right setting and adjust as necessary using the control panel. Once that’s done there’s a few other steps to perform.
An LG fridge most commonly will not work because of issues with airflow between the fridge and freezer compartments. This can be caused by the vents becoming blocked by ice or stored food, or by a broken evaporator fan. Other causes include the wrong settings on the fridge or broken components.
Generally, it’s because the freezer is not set to the correct temperature. LG recommends that the freezer temperature be set to -4°F (20°C). The digital display on the front of your fridge can be used to set the temperature. Simply press the freezer temperature button.
The water supply line can be replaced with a new one fairly easily. But, the water supply line might have been set too high and may have caused the line to burst or crack. Other times the line could have bent back on itself and weakened it in such a way that it breaks.
Generally, fixing it yourself is very difficult and it’s best to hire a technician to repair an LG ice maker flap that isn’t opening. To repair it the front needs to be removed to expose what’s called a solenoid, but it requires experience with electrical wiring.
It’s either the water supply line or the water filter. If the water supply line is leaking, or the water is turned off then your ice maker won’t fill with water. Also, if the water filter is blocked, water won’t be able to get through and into the ice maker.