Can a vehicle s air conditioning (AC) system be topped up with refrigerant because the AC is not cold enough?

No. refrigerant must not be added to any vehicle that may be leaking. A test must first be done to find out if there is a leak in the AC system. Once a leak test is performed, the system must be tagged with the results of the test, including: 1. the date of the test, 2. the name of the person who conducted the leak test, 3. the ODP number and expiry date appearing on the person s ODP card, 4. the results of the test, and 5. if there is a leak in the equipment, a statement that no refrigerant shall be added to the equipment until the leak is repaired. Furthermore, after January 1, 2002, no person shall refill an air-conditioning unit of a motor vehicle with refrigerants containing chlorofluorocarbons (CFCs).  more