Quote Originally Posted by err404 View Post
This issue sounds like the ceramic heating element is not making good contact with the hot end of the extruder shaft. As a result the hot end is actually colder than is being reported. It has either slid up the shaft or is loose. On the m3d it is only held in place by a silicone cover. I'd recommend opening up the extruder and using a small piece of aluminum foil to wrap the end of the hot end and provide a more snug fit for the heating element.
This problem is not uncommon on the m3d.
+1 for the alum foil mod. Great tip.