Im facing the same problem. Since the day I have purchaesd the AC, its not functioning properly. I purchased it in the month of MAy 2010. Samsung AC is defective. No service proffesional has come despite repeated complaints. Service is extremely poor. I would watn people against buying Samsung Acs. They look good but do not function at all. An AC with ordinary looks and more cooling is anytime more preferable than a flashy non-functioning device. I have wasted 33,000 on this latest Samsung model.