I was testing firmware version 188.8.131.52 per T8628.
I tried to start a print and the printer was not heating up at all. The temps for both nozzles stayed around 30C. Despite the printer briefly saying it was heating up, both nozzles would display 30/0. It never fails out and continues to go through all the motions of a regular print.
I let it run for a while, and the temps never changed. The extruder motors never turned either, so there was no stripping out. (I'm assuming they don't turn when the nozzles are below a certain temp.)