Can I fix LG code gF myself?

Start with these safe checks: Make sure the water supply valve to the fridge is fully open and the water line isn't kinked. Unplug the fridge for 60 seconds, plug it into a wall outlet (not a power strip) and wait up to 5 minutes for it to restart fully. If gF continues, have your water pressure checked against the range in your manual, or request service.

When should I call a technician for code gF?

If gF continues, have your water pressure checked against the range in your manual, or request service. Don't open the sealed refrigerant system, cut or braze lines, or add refrigerant. That needs an EPA-certified technician. Turn power off at the breaker or disconnect before opening any panel, and leave capacitors, compressors and control boards to a pro: they can hold a dangerous charge even with the power off.

LG Refrigerator Error Code gF / Er gF: Water flow sensor error

What gF means

The water flow sensor detected a problem, often a closed water valve, a kinked line or wrong water pressure.

Also shown as: Er gF, depending on the model.

Likely causes

Water supply valve closed
Kinked water line
Water pressure outside the sensor's range

Safe first checks

Make sure the water supply valve to the fridge is fully open and the water line isn't kinked.
Unplug the fridge for 60 seconds, plug it into a wall outlet (not a power strip) and wait up to 5 minutes for it to restart fully.

When to stop

If gF continues, have your water pressure checked against the range in your manual, or request service.

Checked against: LG USA Support: LG Refrigerator digital and analog error codes. Codes can differ by model and year, so confirm with your owner's manual.