Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Defective

The unit worked well for our room area emitting sufficient cool mist during the first week only. On second week, the operation suddenly stopped while in use. I called up Holmes and they requested me to dry the unit for 24 hours and re-start. But it never did re-start. It seems that the problem is with the transducer. Holmes replaced it with a Sunbeam SUL-2512 but which does not have the same capacity in emitting mist as the HM495-UC.