You might want to look at your thermistor in side the hvac case they do weird things when they go outHi,
So I have an 02 TB just crossed 150k the ac issue I’m having is it runs down to 45F and is usually fine unless the temp is hot outside over 80f. Or it will be cold for about 20/30 min then won’t blow cold. I have checked the Freon level it is full. The compressor will kick on and off. I have heard about getting the system pcm flashed By dealer. Where is the air intake for the cabin is it On the dash just outside the windshield? Also does the 02 TB have a high pressure cut out? Is there any sensor for cabin air temp? Finally does the ambient air temp sensor tie at all the the AC temp? Thanks again sorry for so many questions.