This drier may also be known as a refrigerator ultra-violet dye drier or a filter drier and is meant to be used with your fridge. This piece is a filter for the refrigerant that moves through the refrigerators sealed-system. The most common reason you will need to replace the filter is if your fridge/freezer is not starting. You should co...Read morensider having this piece installed by an appliance repair technician that is trained and licensed. Installing this part requires specialized knowledge and tools. The installation will require the service technician to recover and recharge the refrigerant in the refrigerators sealed-system.