Quick take
Confirm the exact refrigerator/filter part number, shut off water only if the manual requires it, install the cartridge fully, flush the specified volume and reset the filter indicator.
Match the exact cartridge
OEM and compatible filters may look nearly identical. Verify the appliance model or existing filter number before ordering.
Install until fully seated
Twist-lock and push-in filters need to reach the mechanical stop. Partial seating can cause bypass or leaks.
Flush the new filter
Initial water can contain carbon fines and air. Run the dispenser for the volume specified by the refrigerator or filter manufacturer.
Reset the indicator separately
The filter light is often only a timer and may not reset automatically when the cartridge is changed.