The A/C Booster is a high quality air conditioning improver for passenger cars and heavy duty vehicles. It does not only clean the air conditioning system, but improves and protects the performance as well. The Airco Booster cleans the Multi Air Conditioning (MAC) system by removing the oil residues. Thereby, it leaves a protective layer on these internal surfaces to keep a good performance. Next to protection, this layer enhances lubrication, improves heat exchange across the condenser and evaporator and enhances the refrigerant flow and improves the oil return to the compressor.