I am a professional technician who works for a Tucson-based Alaskan Air Conditioning & Heating company. I recently serviced a 6-year-old split Lennox system. The system was not cooling properly, and I diagnosed the issue as a faulty compressor. I replaced the compressor and performed a thorough cleaning of the system to ensure it was operating at peak efficiency. The customer was very satisfied with the results and expressed gratitude for the prompt and professional service provided by our team.