Haier PBFS21EDBS User Manual page 22

Water Filter
Water filter indicator lights up
This is a signal showing that you might need to replace your old water
filter. It is recommended that after 6 month's operation, or when the
ice production declines greatly, new water filter shall be installed.
Please observe actual usage conditions, and the local portable water
quality, you may need new water filters more often then above
mentioned.
Water filter replacement:
1. Turn the water filter counter clockwise;
2. The water filter will pop open;
3. Take out the water filter from the holder.
The used water filter may hold water, and this residue water may overflow through the hole of the water
filter holder.
NOTE
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