If you are looking to make your car's air conditioning system cooler, then chances are it is emitting warmer air than normal. If this is the case, it is more than likely that your car is running low on coolant. Recharging your car's refrigeration chemicals should make your air conditioner as cool as it can be.
Purchase a can of refrigerant from a local automotive supply store. Buy the appropriate type for your vehicle by reading the instructions.
Locate the service fittings on your vehicle. There are two: the low side fitting and the high side fitting. The low side fitting can be located under the hose that goes from the accumulator to the compressor. The high side fitting is on the hose that goes from the compressor to the condenser.
Connect the recharge hose to the can of refrigerant and turn the valve on the top of the can to puncture the top of the can, allowing the coolant to escape.
Disconnect the low side fitting and connect the can of refrigerant where it was. Turn the valve on the can to slowly release refrigerant into the AC hose. Most cans of refrigerant come with a gauge on the side to let you know when the coolant is at a desired level.
Remove the can and reconnect the low side fitting. Turn on your air conditioning.
