The flat iron seemed to automatically turn off while I was using it and I didn't notice until most of the heat was lost. It did not seem to be a power connection problem because the green light was still on. I had to constantly turn the iron off and back on again during use to get the iron to keep a steady temperature. I contacted the seller but unfortunately their store offers only 30 days return policy and I was a few days late in reporting the problem so my loss.