The most common way to tell if your car is low on refrigerant is to smell it. Low-quality refrigerants can smell like a chemical mix of ammonia and acetone.
Yes, a car can lose freon without a leak.
Yes, you can recharge your car AC by using an electrical outlet and a compatible cord.
If AC is low on refrigerant, the air conditioning unit will not work.
One possible reason your car’s air conditioning may not be working as well as it used to is that the filters have become clogged. To clear the filters, you can take them to a mechanic or use a plunger to push and pull the filters out from the bottom of the unit.