c-3451bizhub 300i

Konica Minolta bizhub 300i error C-3451: Fuser Failure

The Konica Minolta bizhub 300i error C-3451 is a thermal failure indicating the fuser unit has failed to maintain the operating temperature. This safety lockout protects the internal components from overheating. Because this involves electrical heating elements, professional technical service is necessary.

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Common causes

  • 1Fuser thermistor failure.
  • 2Heating element break in the fuser.
  • 3Persistent paper jam causing heat shielding errors.
  • 4Inconsistent power supply.

Solutions

Quick Diagnosis

If the machine displays C-3451 instantly after a power-up attempt, the thermal sensor or heater is likely open-circuit.

Step-by-step Solution

  1. Shut down the system and allow it to cool completely.
  2. Inspect the path for paper jams inside the rear fuser access door.
  3. Check power stability—unplug and re-plug into a dedicated wall outlet.
  4. Call service for a technician reset.

Prevention and Maintenance

Plug the printer into a dedicated power line. Schedule regular fuser inspections based on your monthly page count.

When to call a technician

C-3451 is a hardware fault. You must call a Konica Minolta certified technician to replace the failing component.

Printer Technical Specs

  • Technology: Multifunction Laser
  • Speed: 30 ppm
  • Consumable: TN-328 series
  • Connectivity: Ethernet/USB
  • Usage: Corporate
  • Official Drivers / Support

Steps to follow

  1. 1

    Power off

    Turn the copier off and disconnect it from power to cool down.

  2. 2

    Check for debris

    Ensure no paper fragments are stuck in the fuser area.

  3. 3

    Request service

    This is a hardware code requiring a service reset via the tech menu.

Frequently asked questions

It is a thermal failure involving the fuser unit failing to reach temperature.

No, the machine locks to prevent electrical damage.

Possibly, a technician will verify if the thermistor or heating lamp is functional.

No, it requires a clear from the authorized service menu.

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