I put freon in my car but its blowing hot

Hello, Those A/C fix in a bottle products they sell are horrible. It should be illegal in my opinion. The big problem is that they gum up the system, the amount that goes into the system is not measurable, and they can damage evacuation and recovery equipment when the vehicle finally sees a shop. It sounds like it was blowing some sort of cool air before, so you may be overcharged right now, the compressor may be damaged, or a seal might have finally gone bad with the excess pressure causing your refrigerant to leak out. Have a set of gauges connected to monitor the system, and let them know that you added the bottle of AC pro so the shop can protect their equipment if needed.