The alarm on my 2012 focus estate keeps going off during this hot weather. I assume that its the heat & over sensitivity that sets it off. What really worries me is what if it goes off when I am not around. Will it go off indefinitely or is there a cut out after a period of time. Currently it seems to go off for about 30 seconds then stops, and restarts soon again. I am assuming that there is a cut off when it won't start all over again,- anybody know?