Heater/Air conditioningHeater/Air conditioning  - For pleasant driving - Mitsubishi ASX Owner's Manual - Mitsubishi ASX

The heater/air conditioning can only be used while the engine is running.

See also:

Tips for starting
(1) Do not operate the starter motor continuously for anything longer than 10 seconds; doing so could run down the battery. If the engine does not start, turn the ignition switch back to “LOCK ...

Accessory socket
The accessory socket can be used while the ignition switch is in the “ON” or “ACC” position. Caution ► Be aware that using electronic equipment with the engine off may run the bat ...

Electronic immobilizer (Anti-theft starting system)
The electronic immobilizer has been designed to significantly reduce the possibility of vehicle theft. The purpose of the system is to immobilize the vehicle if an invalid start is attempted. A v ...