On R33s (maybe R32s too) the AC fan isn't really an AC fan, it's more so an "overheat" fan. It is actually hooked to the thermo switch on the side of the radiator and triggers at somewhat close to boiling temps.
On my 1st shit box R33, I ended up replacing it with a Mitsubishi Lancer switch & plug to lower the trigger point. On the 2nd shit box R33, I've placed a diode between the A/C compressor relay trigger & Overheat fan relay trigger to do what it is supposed to do for us Aussies.