How to Fix a Clogged HP DesignJet Print Cartridge

Written by aryeh raphael
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How to Fix a Clogged HP DesignJet Print Cartridge
Clogged cartridges make the ink on printouts uneven. (ink cartridges image by itsallgood from

When you allow a print cartridge to sit unused in your HP DesignJet printer for several weeks or months, the ink may harden and eventually clog. This clog will occur as soon as the ink inside the cartridge dries up, preventing additional ink from passing through. This immediately renders your print cartridge worthless and useless. That is, at least until the time when you are able to clean the clog out from the print cartridge. You can do this in just a few minutes.

Skill level:
Moderately Easy

Things you need

  • Bowl
  • Warm water
  • Cotton swab
  • Paper towels

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  1. 1

    Open your DesignJet cartridge cover to expose the print cartridges. Remove the clogged cartridge to prepare it for fixing.

  2. 2

    Fill the empty bowl with warm water. Hold your printer head or print head in the bowl of warm water for a few minutes. "Printer head" refers to the small area at the bottom of your DesignJet print cartridge, where the ink flows. You will notice the water change colour due to the dry ink that is flowing out of your cartridge.

  3. 3

    Take your DesignJet print cartridge out of the bowl of warm water. Use the cotton swab to wipe its printer head free of any hint of ink that might have been left there. Dab the printer head's end with paper towels to ensure that it is completely wiped dry.

  4. 4

    Place the ink cartridge back into your HP DesignJet printer by pressing it down until the cartridge snaps into place. Locate the arrows found in front of the cartridge and use these to align your cartridge to the correct direction. The DesignJet print cartridge should point to the front side of your printer.

  5. 5

    Check the colour of the cartridge and make sure that it matches the colour label on your ink cartridge slot, before pressing "Enter" on the front of the DesignJet printer. Close the cover of the printer.

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