error-08ES9160 MFP

Error 08 OKI ES9160 MFP: Temperature Fault Troubleshooting

The OKI ES9160 MFP error 08 is a high-priority code signaling a failure in the fuser unit. It occurs when thermistors detect abnormal temperatures—either too high or too low—preventing proper toner fixation. Following a cooling protocol before attempting any repair is essential to protect internal components.

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Common causes

  • 1Overheating due to heavy, uninterrupted usage.
  • 2Failure of the thermal sensor (thermistor) in the fuser.
  • 3Burned out heating lamp.
  • 4Obstruction caused by paper jam near the heating roller.

Solutions

Diagnostic

Error 08 often occurs after long print runs, especially with heavy paper. If the back of the machine feels extremely hot, the thermal protection system has triggered as expected.

Step-by-step Solution

  1. Switch off the printer immediately.
  2. Wait at least 30 minutes for the fuser to cool down completely.
  3. Open the rear door and check for paper jams hindering roller movement.
  4. Restart the device; if the error appears at startup, it indicates a permanent thermistor fault.

Maintenance

Always use the correct paper type settings in your driver so the fuser adjusts its temperature appropriately. Do not install the printer in enclosed spaces with poor airflow, as this accelerates fuser aging.

When to call a technician

If the error persists after cooling, this is a clear sign that the fuser lamp or temperature sensor has failed and needs replacement.

Technical Data

  • Technology: Enterprise color laser printer
  • Speed: 50 ppm
  • Connectivity: Ethernet, USB
  • Capacity: High monthly volume
  • Consumable: ES9160 toner
  • Use: Intensive production
  • Official Drivers / firmware

Steps to follow

  1. 1

    Cool down

    Turn off the device and allow the unit to cool for 30 minutes.

  2. 2

    Inspect

    Open the rear door to ensure no paper is jammed in the fuser.

  3. 3

    Reboot

    Close all covers and turn the printer on again.

Frequently asked questions

This error signals a failure in the fuser unit due to out-of-range temperature.

No, the device locks down for safety until the fuser temperature is corrected.

While not a standard consumable, the fuser is a periodic maintenance part for the ES9160.

Avoid printing heavy paper repeatedly without cooling periods and ensure proper ventilation.

Error 08 OKI ES9160 MFP: Temperature Fault Troubleshooting | Vimazdev