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What This Error Means

Error 13.21 on Lexmark printers indicates a paper jam specifically within the duplexing unit or its paper path.

Detailed Explanation

The Lexmark 13.21 error code is a specific type of paper jam message, pointing to an obstruction or issue within the printer's duplexing mechanism. This unit is responsible for flipping the paper over to print on both sides. When paper enters the duplex path and fails to exit within a predetermined timeframe, or if sensors detect its presence where it shouldn't be, the printer triggers this error. Unlike general paper jams, 13.21 isolates the problem to this particular section, making troubleshooting more focused. Common causes for this error include small pieces of torn paper, staples, paper clips, or other foreign objects lodged in the duplexer. Using incorrect paper types, such as excessively thick, thin, or wrinkled media, can also lead to misfeeds and jams in this intricate path. Furthermore, worn-out rollers within the duplex unit might struggle to grip and transport paper effectively, causing it to stop or crumple. Less frequently, a faulty sensor in the duplex path could erroneously report a jam even when no paper is present, though physical obstructions are far more common.

DIY Troubleshooting Steps

Try these steps before calling a specialist

1
Turn off the printer and unplug it from the power outlet to ensure safety before proceeding.
2
Carefully open all access doors and covers, especially those related to the rear of the printer and the duplex unit (often a detachable component or an internal path).
3
Gently pull out any visible jammed paper. Always pull in the direction of the paper path to avoid tearing, and use both hands if possible.
4
Inspect the duplex path thoroughly for any small, torn pieces of paper that might remain. Use a flashlight if needed to see into dark crevices.
5
Check for any foreign objects like staples, paper clips, or labels that might have fallen into the printer and are obstructing the path.
6
Close all covers and doors securely. Ensure they click into place.
7
Plug the printer back in and turn it on. Allow it to initialize and see if the error clears.
8
If the error persists, try feeding a single sheet of paper through the manual feed tray to see if it jams again, which might help pinpoint the exact location.
9
Consider cleaning the paper pick-up rollers in the duplex unit with a lint-free cloth lightly dampened with distilled water or isopropyl alcohol, allowing them to dry completely before retesting.

When to Call a Specialist

If you've meticulously followed all DIY steps, ensured no paper fragments or foreign objects remain, and the 13.21 error persists, it's time to contact a professional. This typically indicates a more complex mechanical failure, such as worn-out or damaged duplex rollers that require replacement, a malfunctioning paper sensor, or a problem with the duplexing motor or gear assembly. These issues often require specialized tools and expertise to diagnose and repair, and attempting to fix them yourself could lead to further damage.

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LEXMARK Error Code 13.21