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:

To operate without using the keyless operation function
Emergency key The emergency key is built into the keyless operation key. If the keyless operation function cannot be used, for example because the keyless operation key battery has worn out or th ...

Key lock-in prevention system
When the ignition switch is in the “LOCK” (PUSH OFF) position, if you close all the doors and the rear hatch with the keyless operation key left in the vehicle and you try to lock the doors ...

Air conditioning system refrigerant and lubricant recommendations
If the air conditioning seems less effective than usual, the cause might be a refrigerant leak. Have the system inspected by your authorized MITSUBISHI dealer. The air conditioning system in your v ...