The need for a professional to install a dishwasher depends on your level of experience and comfort with plumbing and electrical work. Installing a dishwasher can be a relatively straightforward task for someone with the necessary skills and knowledge, but it does involve dealing with water and electrical connections, which can be potentially hazardous if not done correctly.
If you have experience with basic plumbing and electrical work, and you feel confident in following installation instructions and safety guidelines, you might be able to install a dishwasher yourself. Many dishwashers come with detailed installation instructions that can guide you through the process.
However, if you're unsure about your abilities or lack experience with plumbing and electrical work, it's generally safer to hire a professional to install the dishwasher for you. A professional installer will have the expertise to ensure that the dishwasher is connected properly, avoiding any potential leaks, electrical issues, or damage.
Keep in mind that improper installation could not only damage the dishwasher itself but also cause water damage to your kitchen or pose a safety risk. So, if you're unsure, it's best to err on the side of caution and seek professional help.