Recent Review: we came home from vacation to find our air conditioner wasn't working and it was 102 out side. Called Wallner plumbing co. They said the first opening they would have would be around 11 am the next day. About a half hour later they called and said they had a cancellation and the repair man was on his way! The repair man, Daren Clay, was at our door within 15 min. He went up on the roof, where the air conditioning unit is located and found the problem. He came down to tell us and in discussing the matter we informed him that we had had the same problem the year before, right after we purchased the house. He then checked his records and found that they had replaced the same part last Sept. and since they have a year guarantee on all their work he repaired our air condition for no charge....not even labor! We were very pleased with his work and his help!