If your refrigerator has an indicator that tells you when to change the filter, it needs to be reset when you replace the filter. Each manufacturer has different instructions for resetting the indicator.
Amana - press and hold the dispenser lock and auto light buttons on the dispenser (at the same time) for 4 seconds until the filter status indicator begins to flash, then release the buttons. On some Amana fridges you need to press the dispenser lock and water buttons for 4 seconds until the filter status indicator begins to flash, then release the buttons.
Frigidaire - press and hold the reset button on the dispenser until the green light flashes (up to 15 seconds).
GE and Hotpoint - press and hold the reset water filter button on the dispenser for 3 seconds.
Maytag and Jenn-Air - press and hold the lock and light buttons (lock and water on newer fridges) on the dispenser for about 4 seconds, until the indicator light blinks.
Whirlpool and KitchenAid - press the light switch 5 times within 10 seconds. If the fridge has a filter button, press and hold it for 5-10 seconds.
Samsung - press the ice type and child lock buttons simultaneously for 3 seconds. Note: Hold the buttons for only 3 seconds. If you press these 2 buttons simultaneously for 5 seconds, the reset function ceases. Release the buttons and repeat the same step one more time. The water filter indicator light should turn green.
LG - press and hold the reset button for 3 seconds.
Kenmore - Kenmore refrigerators are made by a number of different manufacturers, so please follow the directions listed above for the actual manufacturer of your fridge.