There are three main possible causes to explain why a car air conditioner is blowing hot air. These causes are a worn out compressor, refrigerant leak, and an electrical problem.
your car ac will only blow hot air when there coolannt in the car is finished or the car is oveerheated.
The AC isn't working.
Your engine is hot.
If your ac is making noises or is blowing hot air instead of cold
Need to add Feron.
It may have a bad heater core.
Low refrigerant charge? Temperature contro set to HOT position?
It is broken. AC's usually blow cold air.
Clutch possibly not engaged compressor maybe.
Is the AC condenser in your system blowing cold air?
AC System probably needs refrigerant added.
turn your heater on in the car to "catch up to the heat". It will eventually lower the temp in cars sounds crazy but it works.