The drain/drip pan will be located behind the back wall of the freezer . Should be two-four screws in the corners of freezer back wall. Once you take panel off you should see the evaporator coils and underneath will be your drain/drip pan. Most likely it will be frozen over a soils block of ice running the lenght of the drip pan. Take a hair dryer to it to melt.ice and use hit water to pour into pan and make sure water flows/drains freely . The end of the line will be located behind your fridge at the bottom behind back panel.