Instruct: Classify an Amazon review into positive or negative sentiment.
Query: shuts off in 5 mins or less

I may have gotten a lemon, but this thing shuts off and must be reset(by unplugging it) within 5 minutes on low, less time on high setting. Pretty worthless to warm a whole room. At least the risk of it burning the house down would be an act of God. I'm sending this bad boy back!