After you jump start, does the battery warning light on your comb. meter still remain?
If it does, you are having charging problem (bad alternator, alternator brush, etc..)
If it goes away, you are having malfunction equipment or bad wiring that keep draining your battery. (blower motor is an example)
BTW, blower motor is a part of A/C system.
It's a fan that push air through the A/C ventilation system.