Refrigerator condenser coils are located on the back of the fridge or across the bottom. When coils are clogged with dust, pet hair and cobwebs, they can’t efficiently release heat. The result is your compressor works harder and longer than it was designed to, using more energy and shortening the life of your fridge. Clean the coils with a coil-cleaning brush and vacuum. A coil-cleaning brush, which is bendable to fit in tight areas, does a thorough job. Look for one online or at appliance stores!