Canon MX478 can lock printing when the waste ink (ink absorber) counter hits a predefined threshold. This guide explains how to reset it.

Inside Canon printers, absorber pads collect excess ink from cleaning and maintenance cycles. The printer uses an internal counter to estimate pad saturation.

This page is prepared for Canon MX478. Service mode instructions are shown only when a matching series procedure is known.

How the Error Appears

• Service / maintenance warning on the screen or driver
• Printer refuses to print even with ink available
• Blinking lights and queued jobs fail
• Error reappears after restart

Perform the Waste Ink Counter Reset

After service mode is enabled (if required), the waste ink counter can be reset using a supported reset procedure/software.

Maintenance Reminder

Treat the reset as a maintenance step. If your printer has extremely high usage, consider cleaning/replacing absorber pads to avoid overflow.

Reset tools and instructions

Use a reliable USB connection and follow the steps in order.

Common Fixes

• Use the correct Stop/Reset press count for your series.
• Repeat the service mode steps carefully (timing matters).
• Power-cycle the printer and try again.
• Close other Canon printer utilities while resetting.
• Try a different USB cable/port if using PC software.

Frequently Asked Questions