Lemon Laws In California

My Mom purchased a new home air conditioning unit, a Trane, about a year and a half ago. But, she has had to spend atleast $500 every other month the past year to have it fixed. The company that installed it and has been servicing it, Snyder, has yet to be able to fix the problem. Everytime they come out they say that it’s fixed but it only breaks again within a month or two. Does anyone know of any lemon laws(state of Florida) that are applicable to this situation? Are there any legal actions that can be taken to actually get her air conditioner fixed correctly or replaced?