Frequently asked questions
Which Prusa printers is this heater block 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's included in the package?
The package includes 1 aluminium Nextruder heater block and 3 M3×4 torx 6 fastening screws — everything you need for replacement without having to purchase additional parts.
Are the heating element and thermistor included?
No. This product includes only the aluminum block and the screws. The 40W heating cartridge and the NTC 100k thermistor – 115 mm are separate parts, available individually or together in the Complete Nextruder Hotend.
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 heater block replacement guide.