I am a highly skilled home service professional who has been in the industry for over 10 years. I recently completed a diagnostic on a Carrier air conditioner. The diagnostic process involved checking the unit's electrical components, refrigerant levels, and airflow. I also tested the unit's performance to ensure it was operating at peak efficiency. If any issues were found, I provided a detailed report outlining the necessary repairs and estimated costs. I am proud to say that the unit passed the diagnostic with flying colors, and the customer was very satisfied with the service.