Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BE VERY WARY OF THIS ITEM!!!!!!!

I had my 2nd one (HLSU22003UC 20" High Velocity Fan, 3 Speed, 23"x7"x23", Chrome) for 3-4 days and it nearly caught fire. NO JOKE!!!! I had the speed set on high and the next thing I know was I heard the motor idling down all of the sudden to the lowest speed possible. I unplugged it immediately and good thing I did, because the motor was extremely hot, and I could smell something burning inside. I have owned 3 of these now in the last 2+ years. One just conked out 3-4 days ago after 2 year of use. Slightly different model than this one listed here though (Patton U2-1887 20-Inch High Velocity Whole-House Air Circulating Fan). Motor/Blades locked up on it. I now have the 3rd one up and running (Patton U2-2003-UC 20-Inch Velocity Air Circulating Fan) and will keep you posted on how this works out.P.S. I should also add that this particular fan/model once put together and running for the first time started making a humming noise right out of the box.