Having someone recharge the system was your first mistake. I've owned many vehicles with over 100,000 and three with over 200,000 that never needed recharging. Improper charging of the system will cause the (damn, cant' think of the sensor's name) sensor(s) in the A/C system to inhibit the clutch from engaging. This would also cause the PTCM to not command the fan to turn.

The fan motor should turn at slow speed when you turn the A/C on, if it does not, either it is not being commanded to turn on (that makes me think the A/C is not turning on) or the Fan Control Module is defective.