I was very thankful that they answered my request immediately and provided a very reasonable estimate. Sam was the one who came out and was able to check the problem promptly. I was really happy with his thoroughness and efficiency for he was able to complete the repair within an hour. He's very professional, fast but thorough, and provided good quality of work. He made the best repair ever. It was working back to normal. I'll be calling this company again for HVAC furnace service.