It is possible to replace your AC unit yourself, but it can be a dangerous and challenging task. If you are not comfortable working with electrical equipment, or if you do not have any experience with this type of work, it is best to hire a professional. Trying to replace an AC unit without the proper knowledge or experience can result in serious injury. Furthermore, if the unit is not installed correctly, it can decrease the efficiency of the AC and lead to higher energy bills. Hiring a professional can save you time and money in the long run, as they will likely do a better job than you could on your own. A professional will have the necessary knowledge and experience to replace the AC unit safely and correctly. They will also be able to advise you on the best type of unit for your home and climate. It is important to remember that replacing an AC unit can be difficult, so if you are not comfortable with DIY projects, it is best to leave it to the experts.