Jump to content

Hot end doesn't heat - solved


Recommended Posts

Posted · Hot end doesn't heat - solved

Starting up my newly assembled Ultimaker Original for its first run, the UltiController displayed a 'MAXTEMP' error and the nozzle didn't heat.

I already double checked all wirings and connections, looked on the forums here for some help.

The blower in the bottom of the printer works fine, as do the stepper motors X, Y Z and their stop ends.

So that part of the printer seems to work well.

I also tried to turn the heater in the nozzle on by hand using the UltiController (CONTROL > TEMPERATURE>NOZZLE). But it didn't respond.

I must admit that I'm not familiar with electronics so I'm stuck and need some help.

Can somebody give a hint which part to test next?

I would be grateful.


  • Link to post
    Share on other sites

    Posted · Hot end doesn't heat - solved

    Check the wiring and connections again. There's a spare wire pair that runs from the head to the electronics. Try swapping over to that one for the temp sensor, and see if that makes a difference.


  • Link to post
    Share on other sites

    Posted · Hot end doesn't heat - solved

    The output at the top of the print head has a 3 pin connector which consists of ground (zero volts), power (5v I think) and a signal. The signal is 0v for 0C and 5V for 500C. So at room temperature it should read around 20C or 200mv.

    If this signal is correct at the top of the UM, test it at the PCB. If it is correct at the PCB then there is probably a bad solder joint that connects that signal to the arduino - just reheat both ends of the circuit.

    But more likely it seems you connect the wrong spare cable - the two cables are identical other than wire color.

    Where to get circuit diagram:


    The circuit diagram, and board layout are here:


    There is a zip file at the top. It contains the "brd" file which is the layout. Also the "sch" file which is the schematic.

    Both files can be opened by eagle software which is free:





  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 48 replies
    • Create New...