Extruder motor issues

Hello group.
I have an issue with the extruder motor of a X1 carbon.
I noticed that after 20 to 30 minutes of printing ASA the extruder motor failed; it was doing noise and not moving anymore. to solve that issue, I changed the extruder motor and the main board of the tool head. This solved the issue and the printer was totally fine for a couple of weeks but now the problem is back.
Now it is even worst, the extruder motor is doing noise all time and not even moving to load or unload the filament.
I would like to know if someone had this issue before and how did to solve it. I would appreciate any info or advice.
thanks in advance.

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Are you heating your chamber? And if so what temperature.