I just got this hotend about a month ago and it seems like the cables have stopped working. The extruder won’t heat up at all but when I plug an older one in it works fine. Is there a fix for the new hotend or is there any reason why it would stop working after only a month?
If you shorted out your heater cartridge or thermistor, it will not work properly anymore and you may need to install new ones. They should be available for purchase from the Lulzbot store.
Here is the how to instructions: https://ohai-kit.alephobjects.com/project/Budaschnozzle_resistor_thermistor/
I would closely check all those crimp joints, I have had the wire break at the crimp more than once.