The Service person immediately identified problem and repaired it. He also identified maintenance item that needed repair and emphasized it was a safety (carbon monoxide) issue. Promised to call back with estimate of replacement parts and labor. They did call back as promised but I had a question and asked that someone call me back as the office person who called me did not know the answer. They never called me back. I did not purchase the recommended replacement from this company as they failed to return my call to answer my questions and their price estimate was very high.