My 3d printer has started overheating the hotend from the second I turn the printer on. And it just keeps getting hotter. The first time it did it I started the print, it got about 15 minutes in, and then I started to smell something odd. It was still trying to print, but was burning and boiling the filament. It was almost 500 degress f. I turned it off, cooled it down, tried to remove the crud that had burned into everything around the head. I bought replacement heating elements and temp sensors (3 of each) and tried replacing parts, and it still kept just going into endless heat mode as soon as I turned it on. I eventually figured the whole printer head module needed replacing, so I bought a brand new one online, it finally arrived and I was so excited to be back printing, only to have it do the exact same thing.
I have tried re-installing the firmware, resetting the firmware via the console, replacing cables, I even tried a little bit of voodoo, and a few curses, but not even that would get the printer to behave…
Does anyone have any ideas on what is happening, and how I can fix it!??