AC question need help Guru's
 

My Ac is not blowing as cold as it used 2. How do i go about refilling or charging it? I noticed there is a black cap on the canister and one down by the radiator. Do you charge the ac system at one of those?

Any help whould be great.

Charging is easy. The real question is why does it need charging...
*If* there is a leak, you'll be recharging the system often.

Charging also requires you to know how much refrigerant is still left in the system to avoid overcharging. The easiest way to tell is to drain the entire system. Unfortunately, the equipment to do that is very expensive. Your best bet would be to take it to a shop that you trust.

That said, the system could be full and your compressor could be bad. Low refrigerant isn't always the problem.