c5351bizhub C35

Konica Minolta bizhub C35 error C5351: Fan failure

The Konica Minolta bizhub C35 error C5351 is a ventilation system fault alert. This code appears when the rotation speed sensor of one of the internal fans reports abnormal revolutions, possibly due to dust obstruction or bearing wear. Maintaining this system is essential for the longevity of internal components.

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Common causes

  • 1Obstruction by thick dust buildup on fan blades.
  • 2Fan motor bearing wear (friction).
  • 3Partially disconnected fan wire.
  • 4Hall sensor (RPM) failure integrated into the motor.

Solutions

Quick Diagnosis

Error C5351 usually appears shortly after startup. If you notice a loud buzzing sound before the message appears, the fan is trying to rotate but something is physically slowing it down.

Step-by-step Solution

  1. Check ventilation: Ensure the back of the device has at least 10 cm of clearance for air circulation.
  2. Clean grilles: Use compressed air to clean external ventilation grilles that accumulate dust.
  3. System restart: Turn off the equipment for 30 minutes to allow the sensor to detect temperature drop and clear the error.
  4. Check for obstacles: Verify there are no loose papers near the air outlets.

Prevention and Maintenance

Perform monthly cleaning of air ducts. If the printer is in a dusty environment, install additional air filters or clean more frequently. Avoid covering ventilation openings with objects.

When to Call a Technician

If the C5351 error persists after cleaning dust, the fan motor is electrically worn and requires replacement by a qualified technician.

Ficha técnica del equipo

  • Technology: Laser multifunction
  • Speed/Performance: 31 ppm
  • Connectivity: USB, Ethernet
  • Feed capacity: 350 sheets
  • Compatible consumable: TNP-22 Toner
  • Recommended use: Medium workload offices
  • Official drivers / firmware

Steps to follow

  1. 1

    Check ventilation

    Ensure the back of the device has at least 10 cm of clearance for air circulation.

  2. 2

    Clean grilles

    Use compressed air to clean external ventilation grilles that accumulate dust.

  3. 3

    System restart

    Turn off the equipment for 30 minutes to allow the sensor to detect temperature drop and clear the error.

Frequently asked questions

C5351 indicates that an internal fan is not reaching normal RPM due to dust or a mechanical failure.

No, the error will stop the machine to prevent overheating that would damage the motherboard or fuser.

TNP-22 toner and imaging units are sensitive to extreme heat; maintaining ventilation is crucial.

Cleaning the grilles every 3 months prevents errors like C5351 significantly.

Konica Minolta bizhub C35 error C5351: Fan failure | Vimazdev