Gasoline is one of the most flammable liquids there is. Its vapors are completely invisible, very heavy, and will secretly travel like a snake from room to room. That's why you should never store gasoline inside your home or basement. Always keep gasoline cool, stored in a tightly sealed, approved safety gasoline container that is prominently labeled and out of reach of children. Keep this container in your garage (detached is preferred) or an outside storage building.
Be sure the thermostat is set in the cooling mode. Just setting the dial below room temperature will not activate the air conditioning if it is set in the heat mode.