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Unable to verify Extruder Type
Just completed the upgrade of my MK3.9 to a MK3.9S (originally a 2018 MK3). 6.4.0 firmware.
Fired it up and to my dismay got an Error# 23615 "Unable to verify Extruder Type, check connections”.
Checked connections to no avail. Would there be a problem with the love board? Looking for any further trouble shooting advice.
Posted : 19/03/2026 3:09 am