Max Temp Error


If the Viki displays the error message “Max Temp,” the hot end or bed is reading temperature above the upper limit set in firmware. (Bed - 150°C, Hot end - GB2-245°C, GB3-350°C on some and 400°C on others)

Before proceeding, please collect and record the following data: 

  • GB number
  • Screenshot of temperature graph when error occurs
  • .factory file
  • Did max temp error happen:
    • While heating the bed?
    • While heating the hot end?
    • During the print? 

Possible Causes: 

  1. Hot end temp set too high
  2. Thermocouple defective (GB3 and GB3+)
  3. Break / short with thermistor (GB2)
  4. Break / short in head cable (GB2)
  5. Thermocouple daughter board defective (GB3 and GB3+) BED ONLY
  6. Thermocouple daughter board jumper is loose (GB3 and GB3+) BED ONLY

Possible Solutions:

  1. Reduce temperature in Simplify3D
  2. Replace thermocouple
  3. Replace thermistor
  4. Replace head cable
  5. Replace daughterboard
  6. Replace jumper wire

Questions or concerns? Reach out to our support team at or open a support ticket

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