Dishwasher quit working - not lights, no response - seems like it has no power. Tried unplugging it... didn't work.

Opened it up, figured out that there's no power to the door switch, and traced it back to a part that clips onto the control board. there is power to one side of the little part that is screwed onto that black plastic piece that clips onto the control board. it seems like some sort of sensor - I assume it should let power through unless it overheats or something. so 1) not sure if it's the issue - should it be letting the power through? 2) if so, do you know what it's called so I can find one to order?

Thank you in advance!