A1 Z axis failure

Usually, when you home the Z axis before you start a print, it stops after if touches the bed a few times. This time, it touched the bed once, and then went up. And up. And up until it couldn’t anymore. It kept trying to go up, and made this horrible grinding noise, which had me running up stairs to turn off the printer.

Kinda scared to start a print again. Any ideas?

I’ve had that happen to me before turned it off, back on again and all was fine.

I am experiencing the same, anyone found a fix?