i got a 99 integra ls. it has 51k. it is getting hot here. one day, my ac just stop working. only blow warm air. first i thought i need to recharge it. but later i notice when i turn on the ac, the ac compressor has no respond.(you will feel the rpm change or jump a little bit when you open AC). is my AC compressor broke or i just need recharge it? how can you tell? thanks!