After a service tech couldn’t resolve the no heat situation for almost 5 hours at my home, after trying his best, he was able to temporarily restore heat for the overnight. Early the next day, Brian Williams, our regular service technician, came to try to resolve the problem. In an hour, he had everything fixed, and even followed up to insure we would have an oil delivery the next day. He’s an excellent troubleshooter, and an all around good guy!