LG GSLV91MBAC Owner's Manual page 48

Water Filter
Push fit connector type
1
Remove the screw cap.
2
Pull the pipe out from the water fitler.
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3
Push the pipe into the water fitler,
making sure the end is fully sealed.
4
Insert the screw cap until the colored
line in the water filter is no longer
visible.
5
Press and hold the Water Filter
button for three seconds. That resets
the Replacement Filter icon. The
new water filter has been activated.
6
Dispense water for approximately 5
minutes to remove trapped air and
contaminants from the system.