LonnieBarrios, unplug the refrigerator, pull the unit away from the wall so you can get behind it. Remove the lower access panel. The big round thing is the compressor and next to it you’ll see the condenser fan and the condenser coils. Use a vacuum, i with the crevice adapter works great. If you don’t have a vacuum at the dollar store MrClean sells a coil cleaning brush $5. It’s about 2 ft long and bristles 3/4 of the length. It works well when a vacuum can’t reach. Never use an air compressor or you’ll have a lori Le dust issue in your home. Make sure you don’t pull any wire off. This should be done at least one a year. . Give the refrigerator 48 hrs to reach tempature