Printhead Clogs Causing Missing Lines on Nozzle Test
Nozzle check showing gaps and missing segments? Your printhead is clogged. Here's how to clear it and get all nozzles firing again.
What's Happening
When you print a nozzle check pattern, you see gaps, missing segments, or entire colors not printing. This means some of the tiny nozzles in your printhead are clogged - ink has dried or debris is blocking them. Clogged nozzles cause streaks, color shifts, and poor print quality.
Quick Checks (Do These First)
- Print a nozzle check pattern - identify exactly which colors/sections are affected.
- Is it just one color or multiple? One color = specific cartridge issue; multiple = printhead problem.
- How long since you last printed? Infrequent printing causes clogs.
- Did you recently change cartridges? Air bubbles can cause temporary gaps.
Step-by-Step Fixes
Fix 1: Automatic Printhead Cleaning
- Access printer maintenance (from software or printer menu)
- Select "Clean Printhead" or "Head Cleaning"
- Run the cleaning cycle
- Print a nozzle check to assess results
- If gaps remain, wait 10 minutes and repeat (max 3 times)
Fix 2: Power/Deep Clean
- If regular cleaning doesn't work, look for "Power Clean" or "Deep Clean"
- This uses significantly more ink but applies more pressure
- Run once, then wait 30 minutes
- Print nozzle check - improvement should be visible
Fix 3: Let Ink Soak (Wait Method)
- After running cleaning cycles, turn off the printer
- Leave it off for 8-24 hours
- This lets cleaning fluid work on dried ink
- Turn on, run another cleaning, and check
Fix 4: Manual Printhead Cleaning
For severe clogs (if printhead is removable):
- Remove the printhead (check your manual for procedure)
- Hold under warm running water, nozzle-side down
- Soak in warm distilled water for 10-30 minutes
- Blot dry on paper towels
- Let air dry completely, then reinstall
If Nothing Worked
Some clogs are permanent, especially in printers that sat unused for months. For printers with integrated cartridge/printhead combos, new cartridges give you new nozzles. For permanent printheads, professional ultrasonic cleaning is a last resort before replacement.
When to Call a Pro
Ultrasonic printhead cleaning is available from some repair services and can recover seemingly-dead heads. However, if the printhead is physically damaged or the cost of repair exceeds printer value, replacement may be more practical.
Need Professional Help?
If you're in the Tampa Bay area and need hands-on assistance, Geeks in Sneaks provides friendly, on-site tech support in Clearwater, Clearwater Beach, and Dunedin.
Related Topics
Need Professional Help?
If you're still having trouble, our expert technicians can help.
Learn about our printer support serviceMore Printer Issues Fixes
See all Printer Issues fixes →How to Prevent Malware from Abusing Network Printers
Concerned about malware using your printer to spread or spy? Here's how to secure network printers against malicious software and attacks.
How to Prevent Kids or Guests from Printing 100-Page Jobs
Tired of accidental massive print jobs from kids or guests? Here's how to set up quotas, require approval, and control who can print what.
How Often Should You Check for Printer Security Updates?
Printer firmware updates aren't optional—they patch security holes. Here's how often to check, how to update, and how to set up automatic updates.
How to Block Unwanted Cloud and Remote Print Features
Don't want HP ePrint, Canon Cloud, or Epson Connect on your printer? Here's how to disable cloud printing features for better privacy and security.
How to Use Guest Networks or VLANs to Isolate Your Printer
Want to keep your printer on a separate network for security? Learn how to use guest networks and VLANs to isolate printers from your main devices.
How to Reset Forgotten Admin Password on Printer Web Interface
Locked out of your printer's web interface? Here's how to reset the admin password for HP, Canon, Epson, and Brother printers.
How to Securely Dispose of Old Printers with Stored Data
Getting rid of an old printer? Learn how to wipe stored data and dispose of it securely so your personal information doesn't end up in the wrong hands.
Are Scanned or Copied Documents Stored on Your Printer?
Wondering if your printer keeps copies of documents you scan or copy? Here's what gets stored, how to check, and how to clear it.