On my Anet a8 the heater cartridge quit working a little bit at a time.I thought the filament had broken off in the extruder.Instead it just got cooler the more it ran,I am going to anchor it to one spot so the wires aren't continually flexing.The wire is broken inside and if you get it in the right position it will work.lol I found a US seller on eBay in the same state I live in,hopefully I will get it pretty quick.