Instruct: Classify an Amazon review into positive or negative sentiment.
Query: There's a problem with this unit when temps go over 100 degrees

My unit is set to turn on a fan in my shed at 90 degrees (then of course off if goes below that), but if the temperature of my shed happens to go over 100 degrees during the day, it will never turn the fan off when the temp goes below 90. I had LUX exchange my first unit, but the replacement acts exactly the same. So now I have a 24 hr timer that powers the LUX unit ON in the morning and OFF in the evening, otherwise the fan would run continuously. So the unit has been nearly useless to me. They definitely have a technical problem with this unit and am quite surprised it hasn't been fixed yet.