Head Over TempHoneywell PX940V

Honeywell PX940V Head Over Temp Error: Fix and Solutions

The 'Head Over Temp' error on the Honeywell PX940V signifies that the printhead temperature has exceeded safety limits. The printer enters this state to protect the printhead from permanent damage or electrical failure. You must allow the unit to cool down and optimize your print settings to prevent recurring thermal shutdowns.

1 views

Common causes

  • 1Excessive darkness settings: Pushing more current through the printhead than necessary.
  • 2Ventilation obstruction: Internal fans cannot dissipate heat through dust-clogged vents.
  • 3High ambient heat: Operating the device in extreme industrial temperatures.
  • 4Defective thermistor: Sensor misreading the actual temperature of the printhead.

Solutions

Diagnóstico rápido

This error occurs when the internal thermistor detects extreme heat. Often accompanied by loud fan noise, this is usually caused by heavy print loads combined with high darkness (heat) settings. Ensure your printer is in a well-ventilated area and not exposed to direct heat sources or high ambient temperatures.

Solución paso a paso

  1. Power off the printer immediately to halt thermal generation.
  2. Allow for cooling for at least 20 minutes with the side cover open.
  3. Inspect airflow and clean any vents, intake filters, or fans that might be blocked by industrial dust.
  4. Optimize print settings by lowering the darkness level and speed in the software to reduce the thermal duty cycle.
  5. Restart and resume printing at a more conservative pace.

Prevención y mantenimiento

Avoid printing at maximum speed/darkness settings continuously. Clean the cooling fan intake filters every month. For high-volume environments, ensure the room temperature is maintained below 40°C to assist the printer’s built-in cooling system.

Cuándo llamar a un técnico

If the printer displays this error immediately after being powered on from a cold state, the internal thermistor sensor is likely faulty. This is a hardware component that cannot be repaired by the user and requires professional service intervention.

Ficha técnica del equipo

  • Technology: Industrial thermal transfer label printer
  • Speed/Performance: Up to 350 mm/s (adjustable)
  • Connectivity: 10/100/1000 Ethernet, USB, Serial RS-232, Wi-Fi optional
  • Media Capacity: 108 mm print width
  • Compatible consumables: Industrial TTR thermal ribbons
  • Recommended use: 24/7 manufacturing and warehouse operations
  • Official drivers / firmware: https://sps.honeywell.com/us/en/support/technical-support/printers/px940-industrial-printer

Steps to follow

  1. 1

    Immediate shutdown

    Turn off the printer to stop all thermal activity and protect the head.

  2. 2

    Clear vents

    Vacuum or blow compressed air through the fan intake areas.

  3. 3

    Adjust print settings

    Reduce heat (Darkness) settings by 10% in the printer driver.

  4. 4

    Resume

    Power on after a 20-minute cool-down period to test functionality.

Frequently asked questions

No, it is dangerous. Continuing to print under thermal distress will permanently degrade the print quality by damaging the printhead heating elements.

A minimum of 20 minutes is recommended to allow the heat to dissipate effectively from the printhead assembly.

High-sensitivity wax-resin ribbons allow for lower temperature settings while maintaining print quality, which directly reduces the heat load.

You can monitor the printer status and temperature logs through the Web UI by accessing the printer's IP address in a web browser.

Honeywell PX940V Head Over Temp Error: Fix and Solutions | Vimazdev