I had a good experience with Pro-Tech Air Conditioning and Heating. I have been using the company for about six to seven years now and they always do consistent work. They have done service to the swamp cooler and so far things have been working fine for me. Overall, I give them five stars for their service and I would recommend them to other people. I have yet to have any issues with their work, and I will continue to use them for my cooler. Keep up the good work.