Solved Up is down and down is down

Hi...I'm sure there is an easy explanation for why my z axis is going down when I send it up...I've seen this problem before but I can't remember why it does this...

When I send the z up, say 40mm, in Controls, it starts to go up, then it comes down and then back up...my prints are being affected as a result...

does anyone know why this happens? I thought maybe the thermistor wires are making contact with hot end? but it looks ok.

Thanks in advance...

 

I agree...but I haven't touched the wires...I did an arduino reset by pushing the reset button, but now it stops printing at layer 4 or 5 and tells me there is a hardware error and the printer stops. When I go to the options tab and hit to show terminal, the terminal screen is going crazy...

I'm at a loss to what it could be and I've practically rebuilt the whole machine in the past...

 

Thanks guys...looks like it was the pololu boards/switches whatever they're called....I switched it out and that did the trick...thanks again...