Of course, it does. AC or any other cooling appliances are not ideal for use in feverish conditions. Ordinarily without the presence of these appliances one's body is already highly vulnerable to fever talk more of using them. You would observe that during cold season people are prone to having cold and catarrh as well as every other symptoms of fever including flu. Basically, AC exacerbate feverish conditions because the individual's respiratory system is highly compromised as cold from gets into the organs for gaseous exchange. The functional efficiency of these organs such as nostril, trachea, lungs and diaphragm is seriously reduced as they shrink from their normal sizes. The abnormal shrinkage is these respiratory organs would force them to present difficulty in breathing before it would affect the immune system as its antibodies is rendered ineffective by the symptoms caused by the cold from AC.