2017-03-10 10 AM a guy called me from this number and said that he will come a do the yearly maintenance on my furnace. He was very insistent, almost commanding. I asked if he had been here before and he said that this is the yearly maintenance. I then went and looked for any labels with his company name on my furnace, which I told him. "You are a smart man" he said and hang up. This is scary - a random person is trying to bluff his way into my home - I wonder what he would do if I let him in.