Not all Samsung refrigerators have a reset button, but those with an ice maker or water filter typically do. The reset button for the ice maker is usually found behind the ice bucket, while the reset button for the water filter indicator is usually found on the appliance's control panel.
Using the reset button on the ice maker is the easiest way to test the unit to ensure that it is functioning properly. The filter indicator light needs to be reset after the appliance's water filter has been changed. While resetting either function takes just a few minutes, appliance owners can opt for a repair person to handle the tasks for them.