e804-0000varioPRINT 140

Canon varioPRINT 140 Error E804-0000: Cooling Fan Fault

The Canon varioPRINT 140 error E804-0000 warns of a failure in the printer's cooling subsystem. To protect internal sensitive electronics from heat damage, the printer initiates a safety halt when it senses fan speed irregularities. When users say my Canon varioPRINT 140 shows error E804-0000, it is usually due to dust-clogged vents or an aging fan motor that needs cleaning or replacement.

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Common causes

  • 1Severe dust buildup inhibiting cooling fan rotation.
  • 2Mechanical bearing wear causing increased resistance.
  • 3Obstruction of the external exhaust venting system.
  • 4Internal electrical circuit failure at the fan connector.

Solutions

Quick Diagnosis

If you hear no fan noise or an unusual screeching upon starting the machine, the cooling circuit is likely compromised. This prevents safe operation and forces a protective lockout.

Step-by-Step Solution

  1. Visual check: Check all external exhaust vents for dust blockage or physical obstructions that might be preventing the fans from spinning.
  2. Preventive cleaning: With the printer powered off, use compressed air to blow out dust from the vents to restore airflow to the cooling system.
  3. Verification: Power on the unit and listen for any abnormal noises or grinding from the cooling fans during startup.

Prevention and Maintenance

Keep the printer at least 12 inches away from walls. Schedule a regular cleaning cycle for your intake and exhaust vents to prevent dust buildup from stressing the cooling motors.

When to Call a Technician

If cleaning the vents does not clear the E804-0000 error, contact support for a technician to replace the malfunctioning cooling fan motor.

Device Technical Sheet

  • Technology: High-volume digital production
  • Speed/Output: 143 ppm
  • Connectivity: Fast Gigabit Ethernet
  • Input capacity: Industrial modular paper feeders
  • Compatible consumables: Genuine original high-capacity toner
  • Recommended use: Continuous production environment
  • Official drivers / firmware

Steps to follow

  1. 1

    Visual check

    Check all external exhaust vents for dust blockage or physical obstructions that might be preventing the fans from spinning.

  2. 2

    Preventive cleaning

    With the printer powered off, use compressed air to blow out dust from the vents to restore airflow to the cooling system.

  3. 3

    Verification

    Power on the unit and listen for any abnormal noises or grinding from the cooling fans during startup.

Frequently asked questions

This error means a fan in the cooling circuit is failing to rotate at the correct speed, triggering a safety shut-off to prevent overheating.

No. Running the printer without proper cooling will cause heat buildup that can destroy critical electrical components.

Not always. A thorough cleaning might fix it, but persistent noise suggests mechanical failure requiring a replacement fan.

Provide proper spacing around the unit and follow a quarterly maintenance schedule to blow out dust from intake/exhaust vents.