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How to Fix Canon Printer Error B504?
May 28, 2024
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Your Canon printer will show a B504 error when there is no ink flowing to the printhead to keep it cool. This can happen because:

  1. The cartridge is running out of ink.
  2. The printer hasn't been used for a while.
  3. The ink has dried up.


Canon B504 error



If you see the B504 error message, follow these steps to fix it:


1. Unplug the power cord.


Unplug the power cord



2. Open the front cover.


Open the front cover



3. Use a tool to lift these two slots to remove the upper component.


Lift two slotsRemove the upper component



4. To change the ink cartridges, manually move the printhead carriage to the left.


Manually move the printhead carriage to the left.



5. Take out all ink cartrigdes.


Take out all cartridges



6. Install a new set of cartridges.


Install a new set of cartridges



5. Reinstall the upper componet back into the printer.


Reinstall the upper componet back into the printer



6. Close the front cover.


Close the front cover



7. Plug in the power cord and restart the printer.


Plug in the power cordRestart the printer



8. The error should be fixed after following these steps.


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