How to Clean Refrigerator Coils
Be sure to unplug the refrigerator before you begin cleaning it, or turn off your refrigerator's circuit breaker if it is a built-in model. When you remove the cover panel, it will most likely lift easily off. If it doesn't, then check to see if there are screws that you must remove first.
In addition to your vacuum nozzle, there are special refrigerator coil brushes available for cleaning the coils. These look a bit like a large bottlebrush with a long handle. They can come in handy when cleaning your refrigerator. As you are cleaning, take care not to put any bends or dents in the cooling fins.
When you have finished cleaning the refrigerator coils, simply replace the cover. Be sure to put back any screws that you removed when taking the cover off initially. Plug the refrigerator back in or, if you turned the circuit breaker off, turn it back on. Then put the appliance back in its place.