The right amount of refrigerant is required for the AC to work. The air conditioning system will stop functioning without the right amount of refrigerant, resulting in expensive repairs and even unit replacement. AC service will be needed if your compressor is damaged or not running smoothly, if there is a leak from any visible part of the coil or inside the system, if you have water puddling inside your condenser or on top of your evaporator coil, or if you see water dripping down from your discharge tube at any time. In conclusion, AC repair is essential for the operating efficiency of your air conditioning system.