c-5351bizhub 300i

Fix Konica Minolta bizhub 300i error C-5351: Fuser Fan Fix

The Konica Minolta bizhub 300i error C-5351 signals a critical thermal issue with the fuser assembly fan. If the airflow is insufficient to cool the heating element, the machine halts to prevent overheating. Why is my Konica Minolta bizhub 300i showing error C-5351? Usually, it is caused by mechanical fan failure or debris blocking the cooling exhaust.

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Common causes

  • 1Fuser Cooling Fan (FM) motor failure.
  • 2Heavy dust buildup within the fan housing.
  • 3Electrical disruption in the fan connector ribbon.
  • 4Worn fan bearings causing increased rotational resistance.

Solutions

Diagnóstico rápido

If the machine displays C-5351 during heavy usage, check the rear ventilation ports. If there is intense heat radiating from the machine and the fan noise is absent, you have confirmed the fan is not operating.

Solución paso a paso

  1. Cool Down: Power off the device and wait at least 20 minutes to allow the fuser unit to cool down completely.
  2. Visual Check: Open the side panel and check for any physical obstructions near the cooling fan.
  3. Air Cleaning: Use compressed air to blow out dust from the printer's rear ventilation grilles.
  4. Reboot: Turn the printer back on. If the error remains, the fan motor has likely reached its end-of-life.

Prevención y mantenimiento

Clean ventilation ports monthly using compressed air to maintain optimal airflow. Ensure the printer isn't positioned directly against a wall, as this restricts exhaust airflow. Use original consumables to prevent excessive heat generation from poor-quality toners.

Cuándo llamar a un técnico

If the fan doesn't start after a thorough clean, the unit needs a mechanical replacement by a technician to prevent secondary damage to the fuser.

Ficha técnica del equipo

  • Technology: Laser printing.
  • Speed/Approx Performance: 30 ppm.
  • Connectivity: Gigabit Ethernet, USB.
  • Feeding Capacity: Standard trays.
  • Compatible Consumable: TN328 Series.
  • Recommended Use: Mid-to-high volume offices.
  • Official drivers / firmware

Steps to follow

  1. 1

    Cool Down

    Power off the device and wait at least 20 minutes to allow the fuser unit to cool down completely.

  2. 2

    Visual Check

    Open the side panel and check for any physical obstructions near the cooling fan.

  3. 3

    Air Cleaning

    Use compressed air to blow out dust from the printer's rear ventilation grilles.

  4. 4

    Reboot

    Turn the printer back on. If the error remains, the fan motor has likely reached its end-of-life.

Frequently asked questions

This error means the fuser cooling fan is either spinning too slowly or is completely unresponsive.

Yes, operating the fuser without adequate cooling risks melting internal parts and causing severe hardware damage.

Yes, the fuser roller and cleaning units are nearby; keep the area clean to prevent toner spill-related failures.

Keep the printer in a well-ventilated space and ensure at least 8 inches of clearance from the rear exhaust.

Fix Konica Minolta bizhub 300i error C-5351: Fuser Fan Fix | Vimazdev