Worked fine for a year. Called OS and they said it was under warranty and someone would contact me in two days. No one did so I called back after a week. They transferred me to an extended warranty division who said they could not help. They said I needed to go through the manufacturer then wrongfully transferred me to a pet supply company. Ugh!!! I am concerned that this is grey market and the manufacturer will not honor the warranty. I will try and see.