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Smithy,
Thank you. I have cleaned the surface and the tips. I did another manual leveling and now the machine will start to do a calibration like it wants to print but it is hovering a quarter inch above the plate.
I am getting a new error message about a nozzle sensor not working properly. This has never happened before and I recently upgraded to new firmware. Could this be the problem? I am on a U3 and U3 Extended.