I called and they had a technicians out to my house in 5 hrs. Mike and Les were unbelievably professional, knowledgable and freindly. They diagnosed the problem on my furnace in 15 min and had it running in 25 minutes. Then they spent another hour completely checking out the system to make sure their was no collateral damage. They charged me $115 for a service call. These guys on a scale of 1-10, 10 being best, are a 12. Best service A-Z that I have ever witnessed. Do yourself a favor and hire these guys. I have used many HVAC companies over the last 40 years and there is no one close to these guys.