My z axis proximity sensor is lit up in the diagnostics page. Does this me the sensor has gone bad. I cant Ref all home. X and Y will ref out but z will not move. I can jog it manually so I am thinking the sensor has gone bad. any ideas.

I have a cncrouterparts desktop Pro with Proximity Sensors. M3Home is staying lit on the diagnostic screen. I switched out the sensor with another one and still the same. I disconnected the sensor altogether and still lit. I can not ref all home. Shouldn't the M3home go out if I disconnected the sensor altogether? I am stumped here, any help would be appreciated.

---Shouldn't the M3home go out if I disconnected the sensor altogether?

this is depending on your wiring and on the configuration of the Inputs.
maybe a lose/broken is your Problem, but knowing nothing about your
wiring/confiuration makes it hard to help.