VIDEO: How To Purge Air from the Water Line After Replacing the Water Filter
How to Flush the Water Filter System in Whirlpool Refrigerators
It’s important to flush the water system as often as you change the water filter. It is recommended that the Whirlpool water filter be replaced every 6 months, when the indicator light comes on, or as needed. Flushing your refrigerator water filter is a key step that reduces excess air, prepares the filter for use, and removes excess carbon.
Check out Does the Water Filter Need to be Replaced? for other signs your water filter might need to be replaced.