59.b0Color LaserJet Enterprise M555dn

HP Color LaserJet Enterprise M555dn error 59.b0: Fan Fault

The HP Color LaserJet Enterprise M555dn error 59.b0 indicates a fault in the cooling fan motor. The printer's internal controller detects that the fan is not maintaining the necessary RPMs or is seized. Cleaning the ventilation system is often the first effective fix.

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Common causes

  • 1Fan stalled by dust accumulation.
  • 2Worn-out fan bearings.
  • 3Broken power lead to the fan unit.
  • 4Physical obstruction in cooling vents.

Solutions

Diagnóstico rápido

If you see the 59.b0 code, listen for abnormal hums or rattling at the rear of the machine. A stalled fan often generates noise before triggering the protection error.

Solución paso a paso

  1. Disconnect the power supply.
  2. Vacuum the external cooling vents.
  3. Check for any loose wiring near the blades.
  4. Reboot the machine to clear the logic error.

Prevención y mantenimiento

Maintain at least 4 inches of clearance around the printer for proper heat management. Periodic dusting keeps the motor from working harder than needed.

Cuándo llamar a un técnico

If the fan remains motionless after a thorough cleaning and system reset, you must replace the fan module through a technician.

Ficha técnica del equipo

  • Technology: Color Laser
  • Cooling: Active fan management
  • Speed: 40 ppm
  • Consumibles: Genuine HP Toner
  • Connectivity: LAN / USB
  • Official drivers / firmware

Steps to follow

  1. 1

    Check for obstructions

    Ensure no labels or wrappers are covering the printer's rear or side cooling vents.

  2. 2

    Power reset

    Turn off the printer, wait a minute, and restart to allow the fan controller to re-initialize.

  3. 3

    Dust cleaning

    Use compressed air to clean out vents and any accessible fans to remove accumulated dust.

Frequently asked questions

The 59.b0 is a cooling fan motor error, meaning the fan is spinning at the wrong speed or is physically stalled.

Yes, if the fan fails, the printer may overheat and enter a protective lock state to prevent circuit damage.

Yes, cleaning every 6 months helps maintain bearing life, especially in dusty environments.

Always use official HP drivers to ensure reliable power management and error reporting.

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