ok, i connected the burnt part with soldering, couldn't get a wire to stick properly isolated the copper head of the extruder i turned on the printer and realized there is heat coming from the hot end i connected Repetier (was closed) and saw the temp at 120 and rising. i tried to stop it at 140 but it kept going tried to turn on/off the extruder heat. nothing happened. so i turned off the printer what did i do wrong ? did i bypass something ? or is there another part that got affected and i need to change ?