I replaced the AC evaporator, expansion valve, and ac condenser along with all O-rings connecting those pieces of equipment with high and lower pressure tubing. Total cost for those parts, including o-rings, was approximately $200. All parts are new aftermarket. Refrigerant and random odds and ends maybe another $100. After installing everything, the system was able to hold a vacuum. Very excited since my AC is now working and it was a great learning experience. However, I feel like it's bouncing between cold and cool too much. I have no system temperature sensors; it's just off or 1-4 and a dial selecting which temperature I want. Could it possibly be overcharged or undercharged? My system calls for 0.99 lb of R-134A so I purchased a can with 16oz. I stopped maybe 1-2 ounces short of emptying the can because the pressure gauge was starting to enter the yellow "alert" range. The coldest I've seen my AC get is 58 degrees with a thermometer stuck into the ac vent. It normally stays between 60-70 but spends the majority of the time in the 60 to low 60s range. Recirc is on, max AC button is on, and temperature is set to lowest possible. Is this typical or still too warm? Outside temperature is in the 90s.