What to do if you have low refrigerant?

When you discover that your vehicle's air conditioning system has low refrigerant—indicated by warm air blowing from the vents or a clicking compressor clutch—you should take systematic steps to address the problem properly rather than just constantly adding more gas. First, turn off the AC to prevent compressor overheating and potential burnout due to lack of lubricating oil. Second, inspect visible AC lines, hoses, the compressor, and the condenser coil for greasy, oily residue that typically marks the exact location of a refrigerant leak. Third, take your vehicle to a certified professional mechanic or use a UV leak detection kit to locate microscopic punctures or failed seals in the closed system. Fourth, have the damaged component repaired or replaced before evacuating and recharging the system to factory specifications. You can verify success when cold air returns.