Failing extruder temp jog

[BuffBro]

Right before I went to print with my Personal Fabricator, I slightly bumped the head holder and the nozzle temperature constantly shows that it is around 250 degrees. If I use the jog to try and heat up/cool down the nozzle, nothing will happen. The system will also install a new head onto the printer if I ask it to, even without a head on the control board. I do not know what is happening, all the wiring seems to be okay, there are no breaks anywhere I can see. Could it be a change I have to make in the hardware? I've also tried signing in on a different computer, with a different account, and even removing the memory card. Nothing works.