I had a very good experience with John Mullins. John came twice to the property. He inspected the furnace, diagnosed the issue, and placed an order for the part needing replacement. He came back within a week, installed the part, and got the system back on. John was GREAT! He was professional, courteous, and above all an expert in his domain. He was on time and conducted himself respectfully during both visits. His diagnosis was efficient and accurate. His input was candid and with integrity. It is because of employees like John that we call back and do buisness with ARS. Many thanks John M.!