A case study titled “The Impact of Maintenance and Cleaning of Air Conditioning and Refrigeration Systems on Reducing Energy Consumption” was conducted in the Department of Power Mechanics Engineering Technologies, under the supervision of Assistant Lecturer Abrar Abdul Kareem Saeed, with the participation of a group of third-year students. The study aimed to highlight the importance of regular maintenance and cleaning of air conditioning and refrigeration systems in improving their performance and reducing electrical energy consumption. This was achieved by conducting practical measurements before and after maintenance operations and analyzing the results to reach accurate scientific conclusions that support optimal energy use. The results of the study showed that regular maintenance significantly contributes to reducing energy consumption, improving system efficiency, and extending the operational lifespan of the equipment. This, in turn, helps lower economic costs and protect the environment. This study aligns with the efforts of the department to achieve Sustainable Development Goal 13 (Climate Action) by supporting initiatives that reduce carbon emissions, enhance environmental awareness among students, and integrate theoretical knowledge with practical application to serve the community and labor market.