Replace the heater cartridge

The function of the heater cartridge is to heat up the nozzle when loading material or starting a print. It includes thick white wires that are inserted into the heater block.

If the nozzle fails to heat properly, it is possible that one of the heater cartridge wires is damaged. A Heater Error message is a possible indication of this. The heater cartridge can also be damaged by an accumulation of material around the heater block. In both of these cases, the heater cartridge will need to be replaced.

To replace the heater cartridge, it must be removed from the print head and disconnected from the mainboard. The following steps describe how to correctly replace the heater cartridge:

Parts required:

  • 1x 2283 Heater cartridge

Tools required:

  • Hex screwdriver
  • Phillips screwdriver
  • Blue tape
  • Print head alignment aid


10 - 15 minutes


1. Remove the clamp clip

  • Position the print head in the front-right corner of the printer.
  • Remove the blue clamp clip.

2. Remove the Bowden tube

  • Press down on the white tube coupling collet.
  • At the same time, pull the Bowden tube upwards and out of the print head.

3. Remove the thumb screws

  • Position the print head at the mid-point of the X and Y axes for easier access.
  • Loosen the four thumb screws and remove them from the print head.
  • Secure the three parts of the print head housing with tape to ensure that they stay together.

Removing the clamp clip
Removing the Bowden tube

4. Remove the fan bracket

  • The fan bracket is attached with two M3x4 bolts on either side of the hot end.
  • Use a 2.0 hex screwdriver to remove all four bolts.

5. Remove the heater from the heater block

  • Use a Phillips screwdriver to loosen the set screw at the bottom of the heater block.
  • Pull the heater cartridge out of the opening on the left side of the heater block, as seen from the back.

6. Position the printer on its side

  • Manually move the Z stage to the top of the Z axis.
  • Gently position the Ultimaker 2+ on its right side.


7. Loosen the mainboard cover

  • Loosen the two M3x12 bolts that hold the mainboard cover from the inside of the printer, while holding the lock nuts in place with pliers or a socket wrench.

8. Remove the mainboard cover

  • Pull the front of the cover away from the bottom panel.
  • Slide the mainboard cover towards the front of the printer.


9. Loosen the terminal

  • Hold the two white wires from the heater cartridge securely to keep the terminal level.
  • Use a hex screwdriver to push the green terminal marked ‘HEATER1’ towards the bottom panel.

10. Remove the heater wires

  • Use a flathead or hex screwdriver to press down on the orange parts of the terminal.
  • Remove each heater wire.


10. Pull out the heater cartridge

  • Firmly hold the braided sleeve with one hand.
  • With the other, take the end of the heater cartridge at the print head and pull it out through the braided sleeve.



1. Insert the heater wires into the terminal

  • Use a hex screwdriver to press down on the orange parts of the terminal.
  • Fully insert each wire; the orientation does not matter.

✔ Tip: Gently pull at each wire after securing it, to check if it stays in place.

2. Connect the terminal to the mainboard

  • Hold the green terminal in position at ‘HEATER1’ on the mainboard.
  • Move it downwards to slide it over the pins, until it is securely in place.


3. Insert the heater into the braided sleeve

  • Move the other end of the heater cartridge through the hole in the corner of the bottom panel.
  • Push the heater cartridge through the shrink sleeve and into the braided sleeve.

✔ Tip: If you can’t access the end of the braided sleeve, you may need to remove the left motor cover. It is attached with two M3x10 bolts; one in the top of the left panel and one in the bottom of the back panel. Remove these bolts and take the motor cover out of the printer.

4. Forward the wires through the braided sleeve

  • Push the heater cartridge into the braided sleeve as far as possible.
  • If the wires get stuck and can’t be pushed any further, locate the metal end of the cartridge inside the sleeve and pull it forward.
  • Alternate between pushing and pulling if necessary, until it exits the print head.


5. Insert the heater into the heater block

  • Push the metal end of the heater cartridge into the opening on the left side of the heater block, as seen from the back.
  • Make sure the open side of the metal end is facing down.
  • Use a Phillips screwdriver to tighten the screw at the bottom of the heater block to secure the heater cartridge.

✔ Tip: Before tightening the screw, make sure that the sensor is still fully inserted. After tightening, gently pull at the heater and sensor to check if they are secure.

6. Replace the mainboard cover

  • Slide the cover over the board at a slight angle and insert the two small tabs in the back panel. Ensure that none of the wires are stuck between the cover and the frame.
  • Put the cover against the bottom panel, making sure that the two small tabs in the middle are inserted into the notches in the bottom panel and left panel.

7. Secure the mainboard cover

  • Insert the two M3x12 bolts through the bottom panel from the inside of the printer.
  • Hold the lock nuts in place with pliers or a socket wrench and tighten the two M3x12 bolts.

8. Place the printer upright

  • Turn the Ultimaker 2+ upright again.
  • Manually move the Z stage to the bottom.


9. Attach the fan bracket to the hot end

  • Align the fan bracket with the hot end.
  • Secure the fan bracket to the hot end with the four M3x4 bolts.

✔ Tip: To ensure that the nozzle is precisely centered in the hole in the fan bracket, loosely secure each of the four bolts at first. Check the bottom of the print head to align the nozzle, and then tighten the four bolts completely.


⚠ Caution: If the nozzle touches the sides of the hole in the fan bracket, the heat will conduct throughout the whole bracket. This will make it harder for the Ultimaker 2+ to maintain its temperature during printing, which can lead to quality issues or error messages.

10. Align the print head housing and the hot end

  • Remove the tape from the print head housing.
  • Move the hot end upwards to align it with the housing parts.

11. Attach the print head housing to the hot end

  • Insert the four thumb screws.
  • Screw them into the bottom aluminum plate, but do not tighten them securely at this point.

✔ Tip: Make sure that all cables run neatly side by side and the fan wires are not behind the two rear thumb screws.


12. Tighten the thumb screws

  • Completely tighten the two back thumb screws by hand.
  • To tighten the front two thumb screws, use the print head alignment aid. Place the tool in between the aluminum plates of the hot end.
  • Tighten the front two thumb screws until the tool fits securely between the plates, but can still easily be removed.


⚠ Caution: The print head alignment aid is very important to set the correct pressure on the hot end. Securing the print head too loosely may lead to leakages, while over tightening the thumb screws will decrease the lifespan of the TFM coupler.

13. Insert the Bowden tube

  • Press down on the tube coupling collet in the print head.
  • Push the Bowden tube all the way in.

14. Ensure the Bowden tube is correctly inserted

  • Let go of the tube coupling collet and gently pull the Bowden tube, along with the tube coupling collet, approximately 2 mm upwards.
  • Hold the tube coupling collet up with your fingernail.
  • While holding the tube coupling collet up, push the Bowden tube down again.

Note: The end of the Bowden tube is not visible in the print head. This step is to ensure that the Bowden tube connects to the TFM coupler. This prevents room between the parts as well as play on the Bowden tube.

15. Secure the clamp clip

  • Place the blue clamp clip around the tube coupling collet to secure the Bowden tube.


Note: If you removed the left motor cover earlier, don’t forget to put it back in place. Click the cover’s tabs into the bottom panel and secure the cover in place with the two M3x10 bolts.

Download this information as a PDF