I called Fast Water Heater to have repair service on my hot water heater. I originally called the warranty for my water heater and they diagnosed my issue and sent the part. When Rex (maintenance tech) arrived, he quickly determined the warranty department incorrectly diagnosed the issue. He advised me on what the issue actually was, answered all my questions, went the extra mile to correct some other issues, and best of all...was super friendly and professional! Highly recommend the company and be sure to request Rex O.