AC Blowing hot in town

[azhawk22]

I have a 95 4runner, just put in new radiator and thermostat and when I'm in town driving my a/c will start to blow hot air, anyone know why? Is it the condenser?? I had my compressor and freon checked and they were ok. The condenser fan works also so I'm assuming this is the problem.. Suggestions to how I figure it out? Thank you!!