GBC TITAN 1264 heater wont stop

Hey guy's, got in to some trouble with my Titan today.
First the heating element made a real strange noise and the machine just shutdown ...
Opened it up and noticed the element is dead, it was broken and completely shattered. No problem got a spare.
Replaced the element and now the new one wont stop heating, even if I set it at its lowest temperature.
I tried replacing the control panel (the one were you set you temperature) it did not fix it.
I have a spare main board but replacing it is a PITA.
Any one got a clue to what might be wrong ?

Thanks for the help !