well folks, my popz tried his hand at recharging my AC system and ended up overcharging it (gauge reads 100psi @ 90 ambient temp!), so he bled it down by depressing the shrader valve and now the AC doesn't work at all (blows hot, even though the compressor still engages) and the compressor makes some narsty noises. I'm guessing this means the oil is low or gone completely? Can I just use a can of oil charge? The system pressure is now in the acceptable range. I'd like to try to play with it myself before I shell out the $100 for someone to purge and refill the system. I know the system is complete and does not leak if that helps.