Turns on by itself

I have Fridgidaire affinity dryer AEQ8000FS0 . I noticed today that it was on and flashing 40 mins . I turned it off with the cancel button. a few seconds later it was on again. lights flashing on Dryer, extendable tumble etc, I unplugged it for a hour, plugged back and it started again. I did notice that it was really hot drying my clothes the last few times. Any help would be appreciated. thank you
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