Even tho I have the heat bed temp set to 65°C, it often completely overshoots - highest temp I saw before cutting power was 105°C.
The first layers get so soft they deform!
Manually setting the temp on the display does not help.
I purchased this printer in 9/24 and it printed ok until 2 firmware updates ago.
All cables look fine.
What can be done to fix this temp problem?
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I am having the same issue; it started last night, and two prints failed because the bed got too hot.
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Please export the log file from the printer, and open a ticket.
Our team will quickly check to see what might be the problem, and offer a solution.
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Update: Support was very helpful. I was sent a new heat bed and controller and was able to succesfully replace both parts thanks to bambu wiki’s comprehensive guides. Temperatures now stay within the set range 
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