Homing mk1 z axis

Hello,

I’m having a problem with homing the z axis. I can jog the z-axis up to the sensor and it will trigger the fault and the red light is on. I unlock it, jog it down a bit but when I run the homing sequence it just crashes going up, the red light is on but it’s not stopping.

Of course it happens the day before I’m selling it.

Thanks!