Fill your kitchen sink halfway with lukewarm water. Set the replacement refrigerator gasket in the water and let it soak while you are removing the old gasket. This will soften the gasket and make it more pliable to install.
Remove the food from the inside door shelves of your refrigerator.
Start at the top of the refrigerator and lift the bottom of the refrigerator door gasket up with your thumbs. You will see the hex heads of the retaining screws that secure the retainer to the door.
Loosen the retaining screws with an appropriate size nut driver or socket wrench. Do not remove the screws. The retainer just needs to be loose enough to remove the door gasket.
Continue loosening the retaining screw across the top of the door, down each side of the door and finally at the bottom of the door.
Pull down the top corner of the refrigerator door gasket nearest the door hinge. Remove the gasket from the hinge side and top of the door. Continue pulling the gasket off of the handle side of the door and then the bottom.
Clean away any torn pieces of gasket that may be between the retainer and the door panel. Pull the new door gasket out of the water and dry it with a towel.
Position the new door gasket over the inside of the door. Place the top corner of the gasket between the retainer and the door panel on the hinge side of the door. Push the gasket behind the retainer all the way down the hinge side until you get to the bottom corner.
Pull the top of the door gasket over the top corner on the handle side of the door. Push the gasket between the retainer and the door along the top of the refrigerator door. Continue pushing the gasket behind the retainer on the handle side of the door until you reach the bottom corner.
Pull the hinge side bottom corner of the gasket until you can insert the gasket behind the retainer. Push the gasket into place along the bottom of the door. Use both of your thumbs to maneuver the handle side lower corner of the gasket behind the retainer.
Tighten all of the retaining screws until the retainer is snug against the gasket, but do not tighten the screws fully. Close the refrigerator door to check the alignment of the door, door gasket and the front of the refrigerator. You should have a seal all the way around the door perimeter. Open the door, move the inside door panel as necessary by hand and recheck the alignment.
Tighten all of the retaining screws with the nut driver or socket wrench. Place your food back in the refrigerator door shelves.