Yeah that's an issue we've faced 3 times in the 3 past monthes, and it's irritating.
One PrintCore that was just fine, did not work with this error after reinserting in its exact same slot : we did a little machine maintenance, including the change of the front fan, nothing was disconnected or damages, it was made by the reseller. Once plugged in back, even after multiple restart of the machine, it shown this error, while a direct monitoring of the printcore actually shown a temperature reaching 280+°C. The reseller took the printcore to diagnose it, no idea of the answer it but they replaced it for free, fortunately.
2 weeks later, another error like this one, restart of the machine, went fine.
@MariMakes do you have an idea about this ? It looks like a pretty "recent" issue, hope that it won't happen more and more.
Im guessing that either the pcb on your print core is bad or the one on your print head is bad unfortunately.
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