Installing a new air conditioner yourself is possible, but it's essential to consider several factors. DIY installation requires a good understanding of electrical systems, knowledge of local building codes, and the ability to handle refrigerant properly, which typically requires certification. While self-installation can save on labor costs, improper installation can lead to inefficiency, increased energy costs, and potentially void the warranty. For central air systems, professional installation is recommended to ensure safety, efficiency, and compliance with regulations. Always weigh the benefits against the risks and complexities involved.