We can usually spot problems to your AC-Heater system during periodic maintenance servicing when checking the engine compartment.  But when your car’s air conditioning (AC) begins to lose power and doesn’t blow cool air, it may be time for an AC refrigerant recharging. Recharging your AC means adding more refrigerant to the closed system to allow the air to start blowing cold again.  Sometimes, recharging your AC is a temporary fix to a more substantial problem.  If your system is losing refrigerant, your air conditioning system has a definite leak.  If you suspect you have a leak, you need to have your system inspected and repaired by an auto repair expert.  AC refrigerant does not evaporate in an airtight system.  This means that air must be leaking in. Some older vehicles made before 1995 and that use R12 refrigerant that is no longer made, cannot have their AC unit recharged. The only option with these older units is AC replacement.  An AC recharge can be completed at your home or office and is considered a professional repair, as it contains hazardous liquids and is best left for a Mobile Mechanic Garden Grove mechanic who are properly trained in their handling.