https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/print-fan-selftest-failure-straight-out-of-the-box/ Prusa3D Forum Discussion Board en-US Mon, 08 Jun 2026 12:22:25 +0000 wpForo 60 https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/print-fan-selftest-failure-straight-out-of-the-box/#post-728844 Tue, 03 Dec 2024 22:21:10 +0000 As it is new assembled printer, I'd suggest contacting support - https://help.prusa3d.com/article/customer-support_2287 and see what they say

]]> Assembly and first prints troubleshooting Ken https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/print-fan-selftest-failure-straight-out-of-the-box/#post-728844 https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/print-fan-selftest-failure-straight-out-of-the-box/#post-728815 Tue, 03 Dec 2024 15:30:16 +0000 I'm fairly new to 3d printers. I purchased a brand new assembled MK4S, and it just arrived. Straight out of the box I followed the guide in the manual to set it up and start the selftest. Immediately the print Fan is failing, only reading ~4740rpm each time I run the test. I cleaned out the fan, tried loosening screws, checked to make sure everything is plugged in on the Love board, unplugged and replugged the print fan, and did a factory reset of the printer. Trying all of these things yielded the same result for rpm. Is there anything I can do to resolve this?

]]> Assembly and first prints troubleshooting alexconrad https://forum.prusa3d.com/forum/english-forum-original-prusa-i3-mk4s-assembly-and-first-prints-troubleshooting/print-fan-selftest-failure-straight-out-of-the-box/#post-728815