I've had similar problems with CC as the other reviewers. I had a problem with my furnace where it would try to start (could here the clicking sound), then it would stop. A few seconds later it would try to start again (clicking for a few seconds), then stop. After anywhere from 3-6 attempts, it would either finally start or stop trying. If it stopped trying, I had to shutoff and turn back on, then the process would start again. I learned 3 years ago, this was caused by a dirty flame sensor, as I had the same issue. I called CC to come out and told them what the problem was. I was expecting them to just clean the flame sensor (as they did 3 years ago). I left them to do their work, when I came back, they had taken the flame rods out of the furnace and were "cleaning" it. Now, I already knew the furnace was old and had a possible small crack in a heat exchanger, and was going to need replacing within the near year or so. When they put everything back together again, the furnace started, but every time it did, a flame shot out the front of one of the flame rods. The technician could not figure out what was causing this, had to continually call his boss. I had to leave for the airport as it was nearing Christmas, so I left the technician to work on the problem and told him to call me with status updates. He called several hours later, saying he had fixed the problem, and my furnace was working fine now. When I returned from my trip, I noticed the same problem, both with the flame sensor and the flame shooting out the front. Called CC back, they sent another technician out. He couldn't completely fix the flame problem, but made it such that it doesn't happen every time. A week later, I received two bills, one for each technician. I called CC to complain. I told them, I explained the original problem to the first tech, and told him the flame sensor probably just needs cleaning. CC tells me it's standard practice to look at the whole furnace when fixing a problem, including cleaning the flame rods, etc. I told CC, the flame shooting out of the furnace was not happening before I called them. I asked why I'm paying for a problem their techs caused? Not once but twice, and neither knew how to fix it. They just kept telling me my furnace was old and the CO level was going to be an issue if the furnace wasn't replaced soon. I have a very good CO monitor in my house, that measures very low amounts, and it wasn't picking up anything major. After arguing with CC several times, the manager finally agreed to split the second bill, so I would only pay half. I shouldn't have had to pay the second bill at all. A week later, I called out a friend who does handyman work, told him my problem. He pulled the flame sensor and cleaned it...problem solved; took all of 10 minutes. I agree with other reviews, where it seems like they purposely leave things in a semi-broken state, to make you call them out again. That or their technicians aren't really competent enough to repair furnaces. read more