If the temperature drops below a certain level it sends a signal, 'turn on the heat', and that signal stays on until it gets a negative signal to turn off.
He will pledge to use the money raised by selling offthe government's bank shares for paying down debt (an announcement designed to turn up theheat on the coalition who dream of using the money to pay for share giveaways or tax cuts).
He returned to Liverpool in 1992 with Anfield fully expecting him to turntheheat back up under the team which had gone offthe boil a little from the glory days of the 1970 and 80s.