Re: A/C not cold
No offense Chip, but a recharge kit consist of a can of 134a, a hose with a gauge and fitting. No problem adding refrigerant with a recharge kit.
If you are seeing 40-45 psi with the engine/a/c off, you are low on charge. Start the engine, air on Max, blower on high and add refrigerant until it maintains around 30 to 35 psi with compressor running. It will continue to cycle off and on frequently until there is sufficient pressure as there is a low pressure switch to kick out the compressor.
Anything over 45 is considered overcharged with the system running.