Take a while Dezz man for it to activate.
The 33 air con system works much better than the 32. It will activate at the correct temp regardless whether you have your air con on or not so it work a bit like a back up system as well if you happen to run thermal fan and it stuff up or your clutch fan stuff up and water temp raise, it will kicks in.
Though i don't know about after you've installed PFC as for my 32, i had a heating issue a while ago and the air condensor fan won't activate regardless how much water temp get up to, only activate itself when i have air con running, at the correct temp offcourse.
Best is to pull your radiator out, send it to a Radiator place for service every begining of summer, well i do, you'll be supprise how much blockage they get or tap a stand alone switch that activate the condensor fan at your own desire just to be safe but also allow it to activate itself.