Not having much luck with this recently. The nozzle came loose and liquid plastic went all over the heating block, damaging the thermocouple when I tried to get it off:

Was there any warranty with it. You couldnt have had it that long really. You would have a reasonable expectation it would last longer. Its worth a try. If they say it is out of warranty, you still have rights in that it should be of a reasonable quailty
Ta
Martin

Yep I'm just waiting to hear back from makerbot, if they can send me a new thermocouple I should be able to fix the rest of it