MINTEMP/MAXTEMP Error

This refers to a problem with the PT100 sensor, which is the sensor that measures the temperature of the nozzle. It means that the sensor registers incorrect values and due to safety reasons it will prevent the nozzle from heating up. If you get a MINTEMP error the Ultimaker registers a too low temperature (< 5°C), while a MAXTEMP error suggests a too high temperature (> 300°C). The most likely reason for this is connection problem, which could either happen due to a bad connection at the main board or damage of the sensor itself.

Note: Since the Ultimaker Original+ and Ultimaker Original have different electronics, troubleshooting is slightly different as well. You can check the detailed troubleshooting steps below.

Make sure to always turn the Ultimaker off and disconnect the power supply before troubleshooting this error.

Ultimaker Original+

To check if there is a bad connection on the main board you will have to take a look at the bottom of the Ultimaker:

  • Place the Ultimaker Original+ on its side so you can reach the bottom side and remove the wooden electronics cover.
  • Now you will see the main board. Look for the sensor cable, which is connected to 'TEMP1'.

As an extra test you could try swapping the PT100 sensor (TEMP1) with the one of the heated bed (TEMP3). Try heating both and check if you still get the same error:

  • When the PT100 sensor is connected to 'TEMP3', try heating the heated bed. Are you now getting the "MINTEMP or MAXTEMP ERROR BED"? It seems that the problem has moved along with the sensor, so most likely the sensor is broken.
  • When the heated bed sensor is connected to 'TEMP1', try heating the nozzle. Are you now getting the "MINTEMP or MAXTEMP ERROR"? The problem is still at the same place (TEMP1), so your PT100 sensor is probably fine (double-check by testing 'TEMP3'). In this case we can conclude that the main board causes the problem.

If you can't resolve the issue by these steps you might either need to install a new PT100 sensor or main board on your Ultimaker. Get in touch with one of our local service providers for more help.

Ultimaker Original

To check all the connections, you have to take a look at the following:

  • Make sure that the red and yellow wire of the thermocouple sensor are well secured in the green screen terminal of the thermocouple transmitter board.
  • The connector with the red, yellow and black wire should be attached to the thermocouple transmitter board.
  • Look for 'TEMP1' on the main board and make sure that the connector with the red, yellow and black wire is plugged in properly.

When the error message still shows up, the next step is to rule out a cable break in the print head cable. Therefore take these steps:

  • Attach the connector with the orange, green and brown wires to the thermocouple transmitter board, instead of the connector with the red, yellow and black wires.
  • Swap these connectors on the main board as well; the connector with the orange, green and brown wires should be connected to 'TEMP1'.
  • Test everything once more and see if the error has disappeared.

Still giving problems? This probably means that either the thermocouple sensor or thermocouple transmitter is damaged. You can get in touch with one of our local support departments for further assistance.

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