Canon Printer Error Code E24 — What It Means & How to Fix It

What Does This Error Mean?

Error E24 means the Canon printer cannot recognize the print head. The print head is the part that sprays ink onto the paper. It may not be installed correctly, or the print head may have failed.

Affected Models

Canon PIXMA Pro-10
Canon PIXMA Pro-100
Canon PIXMA Pro9000
Canon PIXMA Pro9500
Canon PIXMA iP4820

Common Causes

The print head is not fully seated in its housing
Ink residue or dirt is on the print head contacts, preventing recognition
The print head lock lever was not fully closed after installation
The print head itself has an electrical fault
The printer's print head contact pins are dirty or bent

How to Fix It

Open the printer cover and unlock the print head lock lever. Carefully remove the print head.

Consult your printer's manual for the exact lever location and removal procedure.
Inspect the gold contact points on the bottom of the print head. Wipe them gently with a lint-free cloth.

Do not use water. Use a dry or very lightly moistened cloth — moisture can damage the contacts.
Also inspect the gold contact pins inside the carriage where the print head sits.

Make sure no ink buildup is on these pins. Clean gently with a dry cotton swab.
Reinstall the print head. Press it firmly down until it clicks into its housing.

Then close the lock lever securely until it latches.
Close the printer cover and power on. The printer should initialize and recognize the print head.

If E24 still appears, the print head or the contact area in the carriage needs professional inspection.

When to Call a Professional

If cleaning the contacts and reseating the print head does not fix E24, the print head has likely failed. Print heads for Canon Pro series printers cost $50 to $150. A technician can also inspect the contact pins on the carriage for damage.

Frequently Asked Questions

Do I need to replace the print head or can I clean it?

Always try cleaning first — it is free and works in many cases. If cleaning the contacts does not fix E24, the print head has likely failed and needs replacement. Print heads are consumable parts and do wear out over time.

Can I use a third-party print head in my Canon printer?

Canon recommends using only genuine Canon print heads. Third-party print heads sometimes work but can also cause recognition errors like E24. Using a non-Canon head may also void your warranty.

How long should a Canon print head last?

With normal home use, a Canon print head can last for years. Heavy use, frequent ink changes, or leaving the printer unused for long periods can shorten its life. Regular use actually keeps the print head healthier than letting it sit idle.