climatizador = climate control system
The other two are not bad because in essence, it is an air conditioner, but if you say climate control system, that also includes the heater part. I worked for 7 years with Freightliner Corp.as their senior translator, and they have those big trucks equipped with the best systems. That's where I learned that the best choice is what I just gave you. Buena Suerte.
my own experience
Local time: 19:12
Native speaker of: Spanish
PRO pts in pair: 61