Exactly . I think there was one year where ESPN or Fox ran a statistic that showed how many TDs the Bears Defense scored over other team ' s offenses . At one point it was like Raiders , Browns , someone else , and then the Bears D was scoring more TDs than them . <| sep |> Where ' s Gregg T . when you need him ? <| sep |> No worries . Most people do hate Nest , but it was free and so far , I ' ve not had issues and this isn ' t much of an issue , it has just piqued my curiosity . The problem with trashed ' s answer is that it doesn ' t explain why it has only happened twice in the past month . If the controller was programmed with a fan delay for the heating cycle and I know many gas furnaces do have this delay and also do not let the thermostat control the fan during the heating cycle , it would delay the fan every cycle not randomly . A Nest bug is currently the most likely cause as I ' ve also heard from a friend that this is a new issue they started having recently . BigMan ' s answer just confirmed that theory .