We had another company come out and inform us we needed a $700+ nitrogen leak check, several pounds of freon (for the unidentified leak) and a $1,200 UV system, that may not solve our problem but we could try it! We had been E. Dennis customers before (when Eddie was just starting the business) for several years. When we purchased a new home, for some reason my husband called this other company. Brandon came out right away, found the problem, and saved us hundreds of dollars. James and Sergy came back, cleaned our system, added the freon and installed the part causing the leak. Plus, we have the piece of mind that the work was done by qualified and honest people! Thanks, E. Dennis!