Abstract: An air conditioner has enormous effects on its users through its air-conditioning processes for many years. Hence, this research is focused on the various air conditioning related diseases, especially the Legionnaire diseases and their effects on production in the textile industry. The study displays the negative effects of the Legionnaire diseases on production as well as highlighting its causes, signs and symptoms, diagnosis and the recommended associated treatments. The study ends up educating all refrigeration technicians, mechanics, engineers and students on this disease and its effects on their various domains of operation. The research used both primary and secondary data. Primary data was collected using questionnaires. Secondary data were mainly gathered from related articles, journals from the internet, published and unpublished books and other sources on the area of study. The data gathered were analyzed using simple statistics such as percentages and figures.