Last time my AC got lame some freon did the trick. But I want to know:

  1. I assume refreshing the freon is super easy that even I can do it in under 10 minutes?
  2. Is there anything subtle to look out for while doing it that an amateur might miss and screw up something?
  3. Is there a check I should do before assuming it is freon?
  4. How often do you guys replace freon in these e46? I think its been about 2 years for me, and I live in South FL so it is on every day pretty much


Is something like this for $40 ok?
https://www.amazon.com/Professional-.../dp/B007USCM7E