The PCB on my 1.2 Ton 5 Star AC has already been replaced 2 times by Carrier, but with no avail. It only lasts for a year and then it fails. It is not able to hold temparture and works only at 17c lowest temprature. And this time it has stopped to work even on 17. Save your money go for Hitachi, Diakin etc. Dont buy Carrier, Bluestar or Midea they are the same company with different branding.