Error messages for the Ultimaker Original+

If there is a problem relating to temperature control on your Ultimaker Original+, the printer will display an error message. In these cases, the print progress is stopped and the heater turns off for safety reasons. Follow the tips on this page to resolve the error message and continue printing.

Warning: Always turn off the Ultimaker Original+ and disconnect the power cable before troubleshooting any of these errors.

MINTEMP or MAXTEMP error

Both of these error messages refer to a problem with the nozzle temperature. The PT100 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 Original+ registers a too low temperature (< 5 °C), while a MAXTEMP error suggests a too high temperature (> 300 °C).

The most likely cause for these errors is a connection problem. This can be a loose connector or damage to one of the components.

Check the print head

Take a look at the back of the print head. The PT100 is the thinner of the two wires that come out of the back of the heater block. 

Check if the sensor is fully inserted into the heater block and if there are no signs of damage to the wire.

Check the mainboard

The sensor may not be connected correctly to the mainboard anymore. To check this, place the printer on its side and remove the mainboard cover. Look for 'TEMP1' on the mainboard and make sure the sensor (with the white and red wires) is securely connected. Reconnect if necessary.

Check the wires Make sure that the thin red and white wires are all still securely inserted into the connector. If one of the wires is loose, the PT100 should be replaced.

Tip: You can also measure the resistance of the PT100 sensor. At room temperature, this should be around 108Ω. If the sensor is damaged, this could show 0 or infinite instead.

UM2series-PT100Bsensor.jpg

This is the connector of the Ultimaker Original+ PT100 sensor. This side is connected to the mainboard.

 

The wires of this connector can be quite fragile, so ensure that they are all still inserted into the connector.

MINTEMP or MAXTEMP error BED

This error message refers to a problem with the sensor that measures the bed temperature. The sensor measures incorrect values and, due to safety reasons, the printer will prevent the bed from heating up.

The most likely cause for this error is a connection problem. This can be a loose connector or damage to the bed or cable.

Check the bed cables

Take a look at the back of the heated bed. There are four wires connected at the back; the two thin ones are for the sensor. Gently pull at the individual wires to check if one of them is loose. If this is the case, the bed must be removed from the printer to reconnect the wire(s).

Check the bed connector The connector at the back of the heated bed could be a screw terminal (older version) or integrated push connectors (newer version). If you see any signs of damage to the plate, the sensor, or the connector, the heated bed must be replaced.
Check the mainboard

The sensor may not be connected correctly to the mainboard anymore. To check this, place the printer on its side and remove the mainboard cover. Look for 'TEMP3' on the mainboard and make sure the cable is securely connected. Reconnect if necessary.

Error_messages_for_Ultimaker2_Heated_bed_connections.jpg UMO+_TEMP3.jpg
Check the wires at the back of the bed
(Ultimaker 2 picture for reference)
The sensor is connected to TEMP3 on the mainboard
Heating failed

The heating failed message means that the Ultimaker Original+ is unable to heat up the nozzle. This error is often accompanied by a flashing display on the UltiController.

This error is could be caused by either the heater or the temperature sensor. Check the tips below to resolve the error message:

Sensor

Check if the temperature sensor is properly inserted into the heater block of the print head. If this is not the case, then the heater does heat up the nozzle, but because the sensor cannot register an increase in temperature, the error appears and all heating is stopped for safety reasons.

Push the end of the temperature sensor into the heater block, and secure it with the small bolt.

Heater

The heater wires may not be connected correctly. Place the printer on its side and check if the wires are fully inserted into the terminal marked HEATER1. Gently pull on each wire to check if it is secure. Ensure the bare ends of the wires cannot touch each other and fully tighten the screws of the terminal.

Additionally, check the cable for signs of damage, especially at the print head. If the protective outer sleeve of the cable is damaged, this can cause a short circuit and the heater should be replaced.

If the error still appears after checking the connections, it could mean that the heater cartridge itself is damaged. Contact support or your local reseller for a replacement.

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