Frequently asked questions
Which Prusa printers is this print fan compatible with?
Compatible with Prusa MK4, MK3.9 and XL. Not compatible with MK4S, MK3.9S, CORE One, CORE One+, CORE One L, MK3.5 or earlier models. Always confirm your model before ordering.
What is the difference between the Print Fan and the Hotend Fan?
The Print Fan cools the air around the printed part (part cooling). The Hotend Fan continuously cools the Nextruder heatsink (prevents heat creep). These are two distinct components with different functions.
How do I know if this fan needs replacing?
Typical symptoms: part undercooling (melted-looking overhangs), abnormal noise, stoppage or reduced speed detected by firmware, or visible physical damage.
Where can I find the installation manual?
The repair manual is available at help.prusa3d.com — select the MK4, MK3.9 or XL model to access the correct print fan replacement guide.