We have had ours for two years and it's been an issue since the beginning. Sometimes it heats, sometimes it doesn't. And when it does heat, it does so very unevenly. One side of the plated food will be piping hot and the other half will be lukewarm. It took us awhile to figure it out, but when it doesn't heat at all, you can hear the fan running but not the heating mechanism humming. If we give the whole drawer a little boost up, then it will heat. So dumb and annoying.