How to Fix Magenta Clog on Epson WF-5621 When Built-In Cleaning Fails

Question:

I’ve cleaned my Epson WF-5621 printhead using the built-in cleaning cycle over 10 times, but the magenta channel is still blocked. What can I do to fix this issue?

Answer:

Understanding the Problem:

The Epson WF-5621, like many of its WorkForce siblings, uses a PrecisionCore printhead, which can develop stubborn clogs, especially in the magenta channel. It's not uncommon for users to run the built-in head cleaning function multiple times with no noticeable improvement. If the magenta is still not printing after 10 cycles, it’s a strong sign that a deeper issue—such as air blockage, ink drying, or damper failure—may be involved.

Recommended Fixes:

1. Manual Printhead Flush

When the internal cleaning fails, a manual flush is the next step. Here’s how to safely perform this:

• Park the Printhead Correctly: Turn the printer on and let the printhead return to its home position on the capping station. Please do not force it with the power off. Parking the printer with the power ensures proper alignment.

• Connect to the Waste Line: Attach a small syringe and flexible tube to the waste line of the capping station. Draw 1.5 to 2 ml of air slowly. At around 1.5 ml, you should feel slight resistance. That resistance indicates that ink is being pulled through the nozzles correctly.

• Watch for Signs of Blockage or Leaks:

  • If you're only pulling air, the printhead is likely not appropriately sealed to the capping station, or there's a leak in the station’s rubber seal.

  • If you experience complete resistance from the start, the capping station may be clogged.

  • Listen for a “crinkling” noise in the damper membrane, which can indicate suction is opening up the ink flow.

• Final Step: After drawing the air, hold the vacuum for about 10 seconds to allow the ink to flow and soften any dried residue. Once complete, run one normal cleaning cycle from the printer’s menu, but avoid vigorous cleanings or repeated cycles for at least 12 hours. Let the printer rest and stabilize before trying again.

2. Check Dampers and Ink Lines

Dampers function like mini reservoirs, helping to regulate ink flow. If they’re filled with air or dried ink, the magenta won’t reach the printhead properly. Remove the ink cartridges and check the damper tubing. Replacing or priming the lines can restore consistent ink delivery.

3. Inspect the Capping Station

A dirty or failing capping station can’t provide proper suction for cleanings or seal the printhead for resting. If it’s clogged with gunk, no amount of cleaning cycles will help. Clean it manually with distilled water and a lint-free cloth, or consider replacing it if it shows signs of wear.

4. Avoid Strong Cleans

Many users overuse the "Strong Cleaning" function. Epson warns that repeated strong cleans can overheat the printhead or introduce air bubbles into the system, worsening clogs. Stick to manual methods when the basic cleaning fails.

Need More Help?

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. Therefore, we're unable to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis. Therefore, it may take a few weeks before we can arrange for your printer to drop it off. Our services are structured to repair either the whole printer or specific parts, with clear instructions on how to proceed. However, we acknowledge that our rates aren't the most economical. Thus, we highly recommend that you resort to self-help via online research. You can start by checking out YouTube or visiting our YouTube channel's homepage (https://youtube.com/@bchtechnologies). Look for specific videos using the search icon next to "About" on the right-hand side of the menu bar. I receive dozens of queries every day asking about videos for specific topics. Having created videos over the past nine years, it's challenging to remember every single one. Therefore, using YouTube's search function would be the most efficient approach. Additionally, YouTube may suggest relevant videos from other channels that can assist you.

Thanks again for supporting our channel and reaching out with your question. We’re always here to help guide you toward the best path, whether it’s DIY repair or seeking professional service.