I would check
Endstop, like @stu_le_brew suggested. Move the head manually and check they do ‘click’. Maybe the metal of the endstop it’s bend and with care that’s easy to fix.
The central smooth rods, the Left to right one, does it scratch the panels inside? You should be able to push/pull it if that’s so.
When was the last time you did an oil/shafts maintenance?
https://ultimaker.com/en/resources/150-lubricating-the-axles
Also make photos of the inside, the endstops are located near the bottom left corne. Also with the machine off, move the head and try to locate where the friction is coming from.
Edited by Guest
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stu_le_brew 42
it looks like a problem with the micro switch at the back left (its fixed to the top of the printer by two screws)
Have you recently dis assembled the machine,maybe its become disconnected from the mother board ? Its not to difficult to replace, you can test its function with a simple electrical meter
you should be able to hear it click when you move the head manually to the left side of the machine
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