Abstract: An automatic digital safety system for controlling the starting and continued energization of one or more internal combustion engines within an engine compartment and for controlling the energization of exhaust blowers in fluid communication with the engine compartment. A guardian control unit disables starter motors and ignition coils of the engines, while simultaneously energizing the exhaust blowers for a first predetermined time interval after their ignition switches are turned ON. Blower sensor circuits sense the energized state of the blowers. Whenever the sensors indicate that the blowers are not energized when enabled, the system disables the engines. After the first predetermined time interval, the engine coils and starters are enabled and the blowers remain energized.