Three weeks ago my air conditioner started to blow nothing but hot air (1990 300Z, R134A retrofited in 2008). Dealership tested and ordered a new compressor. Since it would take a few days for the compressor to arrive, I drove the car home. For the past 3 weeks I have been driving the car ever day with the air conditioner on high. If now works great. Could it be I really don’t need a new compressor after all?
Actually, you do. Or at least you will. It’s just that the system now only works when you max it. This can only be an issue with your compressor.
And are you going to ask this question tomorrow, too?