my Ender3 v3 KE is heating itself without being told so. i did try to unplug the heating cable and repluging it while it was ruinning (i know it is dangerous but i wanted to try. The printer was so hot that it started to burn the silicone cover
unplug the heating cable ? 
when it’s started heating, was it viewable on screen ?
yes thats what i did but itjust shows that it goes hotter and hotter.
i did factory reset but it still rises real fast