I turned n my ac the fan works but compressor will not start

Is the fan on the condenser working? If so it could be a number of things. Compressor overheated to due beinbg low on freon, burnt terminal on compressor, compressor locked up and needs hard start kit. Bad capacitor

You the fan works. I will check about burnt terminal etc . It worked well all summer . I shut it down for a couple of weeks. Now it will not start. Where do I find a hard start kit?

You can get a hard start kit at your local hvac supply