Put on A/C compressor belt & gave it a go. The fan comes on but no compressor action. Since the compressor has not been started in over 2 years, and the reason it was out of action is because it was blowing warm air, there's no doubt it's out of freon.

I also found out my can of Freeze 12 will not go on the connection directly. Both the can & the compressor connecter have threads so there must be something that goes on both can & compressor. Is there a hose kit that I have to buy also?