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ZD621 and ZD611 Alert: Print Head Under Temperature

Head Under Temp
Head Under Temp

Alert: Printhead Under Temp

Description: The printhead is below operating temperature for proper printing. 

Possible Cause 1: The ambient temperature at the printers location is below the specified operating range. 

  • Resolution: Turn the printer off. Move the printer location and wait for it to warm naturally. Moisture may condense in and on the printer if the temperature changes too quickly.

Possible Cause 2: The printhead thermistor has failed.

  • Resolution: Replace the printhead.