Which of the following is a common maintenance requirement for RV refrigerators?

Regular cleaning of coils is an essential maintenance requirement for RV refrigerators because it ensures the efficiency and longevity of the cooling system. Dust and debris can accumulate on the coils, restricting airflow and affecting the refrigerator's ability to dissipate heat effectively. This can lead to increased energy consumption and potential overheating of the appliance. By keeping the coils clean, users can optimize the refrigerator's performance, leading to more efficient cooling and reduced wear on the system.

In contrast, other maintenance tasks such as yearly replacement of coolant or monthly testing of thermocouples are not typical requirements for RV refrigerators. RV refrigerators, particularly those that operate on the absorption refrigeration principle, do not use coolant in the same way traditional refrigerators do, and thermocouples usually don’t require such frequent testing. Furthermore, while inspecting for leaks is important, it does not need to occur on a weekly basis for regular maintenance, making them less common requirements compared to the regular cleaning of coils.