Geeetech

so here is my problem. i purchased a new hotend 12v e3d v6 and i have it installed. the problem im having is i cant get pid tune it at all. pid tune starts then says failed cause over heating. im lost any help would be appreciated thanks in advance

I know this is nearly 2 years late and I assume you have resolved this but these printers are 24v not 12v. So the 12v heater cartridge will massively overheat instantly due to it being given 2x the voltage it is rated for