Frequently asked questions
Which Prusa printers is this hotend fan compatible with?
Compatible with Prusa MK4, MK4S, MK3.9, MK3.9S, XL, CORE One, CORE One+, and CORE One L. Not compatible with MK3.5, MK3.5S, MK3S+, MK3, MK2.5S, MK2.5, MINI, MINI+, MMU3, SL1S, HT90, or INDX.
What is the difference between the Hotend Fan and the Part Cooling Fan?
The Hotend Fan continuously cools the Nextruder's heatsink to prevent heat creep (it runs constantly). The Print Fan cools the printed part (it cools the deposited plastic). They are distinct components with different functions.
Can heat creep cause permanent clogs in the hotend?
Yes. Heat creep softens the filament in the cold zone of the heatsink, which can cause it to solidify in the wrong position and lead to difficult-to-remove clogs. A fan in good working condition is the main preventative measure.
Where can I find the installation manual?
The repair manual is available at help.prusa3d.com — select your specific printer model to access the correct hotend fan replacement guide.