e003imageCLASS LBP112

Canon imageCLASS LBP112 Error E003: Fan Failure

The Canon imageCLASS LBP112 error E003 is a safety alert indicating that the cooling fan is not operating at the required speed. Without the fan, the printer's sensitive electronics and fuser unit are at risk of thermal damage. This is a protective lockout that prevents operation until airflow is restored.

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Common causes

  • 1Dust buildup blocking fan blades.
  • 2Cooling fan motor hardware failure.
  • 3Defective RPM (speed) sensor on the fan.
  • 4Loose electrical connection to the fan unit.

Solutions

Diagnóstico rápido

Listen for a clicking or grinding sound near the printer's rear. If you don't hear the fan start after powering on, or if the unit gets hot quickly, the fan is the primary suspect.

Solución paso a paso

  1. Power off the device and unplug it.
  2. Inspect the ventilation slots for massive dust buildup.
  3. With the printer off, use compressed air to clean all ventilation ports.
  4. Check the fan blades for physical obstructions.
  5. Restart and observe the status light.

Prevención y mantenimiento

Clean external vents quarterly to prevent heat trap. Ensure the device isn't positioned against a wall, leaving at least 6 inches of clearance.

Cuándo llamar a un técnico

If the fan doesn't spin even after clearing dust, the internal motor or the controller's fan-driver circuit requires professional repair.

Ficha técnica del equipo

  • Technology: Laser
  • Cooling: Variable-speed internal fan
  • Connectivity: USB
  • Consumibles: CRG-047 series
  • Usage: Personal/Desk
  • Drivers / Official Firmware

Frequently asked questions

The fan speed sensor reports that the fan is not spinning, risking internal component damage due to heat.

No, continuing to print without proper cooling can cause critical hardware failure.

Low-quality paper sheds excessive dust which can clog the fan blades over time.

Keep the printer in a well-ventilated area and regularly clean external vents with compressed air.