Limric arrived on time and started working on my heating system. They replaced the gas regulator and that did not solve the problem. A supervisor was called and he came to the job to observe what was going on with the heating unit. After 6 hours of observing and analyzing what was going on with the heating unit they determined it was the control board that was creating the problem. The board had to be ordered and will take two days to arrive. 59 degrees in the house this morning not a pleasant wake up, thank goodness I am from Virginia and use to cold weather. I hope Friday is a successful remedy to The heating problem. The technician was very pleasant through the whole process, even though he was frustrated with the challenge he faced.