Common signs that your AC unit may need repair or replacement include unusual noises, decreased cooling performance, increased energy bills, foul odors, or leaks coming from the unit. If you notice any of these issues, it’s best to seek professional AC services to diagnose the problem accurately and provide the necessary repairs or replacements. A professional service provider can help identify potential issues, offer expert advice, and guide you in deciding the most suitable course of action for your air conditioning system.