Troubleshooting Fake Paper Jam Errors + Error Code 31 on Epson ET-8550

Question:
I have an Epson ET-8550 and continually get false paper jams and Error Code 31. I have checked, but I can't find any real paper jam. Why is this happening, and how can I solve it?
 
Answer:
Thank you for reaching out! I'm genuinely sorry for the delay in getting back to you. I know you had a printer problem that needs to be solved immediately. You can learn more and join our community at BCH Technologies (https://bchtechnologies.com). We thank you for subscribing to our YouTube channel (https://youtube.com/@bchtechnologies). Your questions allow us to enhance our technical expertise and content further.
Now, we can move on to your issue with your Epson ET-8550.
 
Fake Paper Jam And Error Code 31 In Printer
 
Here are some common culprits when your printer keeps saying that it has a paper jam when it doesn't.
 
Sensor Malfunction
The printer uses optical sensors to sense if paper is present. If these sensors become dirty, misaligned, or defective, they can incorrectly register a paper jam error.
 
Debris in the Paper Path
Even small pieces of paper or dust, as small as a pinhead, can cut the paper sensors the wrong way and receive them as an obstruction.
 
Roller Problems
Rollers // Feed the paper through the machine. If the rollers are dirty, worn, or out of alignment, the printer may think the paper is stuck when it's not.
 
Firmware Glitches
Old or corrupt firmware can always lead to printer misreporting errors.
 
Mechanical Misalignment
This misaligned printhead or capping station can lead to Error Code 31 because it prevents the printer from functioning correctly.
 
Troubleshooting Steps
Here's what you can do to fix the problem:
 
Clean the Paper Sensors

• Power down the printer and unplug it.
• Locate the paper path sensors (usually near the rollers) by opening the printer's access panel.
• Wipe the sensors with a soft cloth a little wet with isopropyl alcohol.
• Wait for the sensors to dry, then turn on your printer again.

 
Inspect the Paper Path

• Once you open all the possible panels, you should visually search for any tiny bit of torn paper or dust buildup.
• Evacuate dust/debris with compressed air.
• The rollers are not moving smoothly; it is manual rotation.

 
Check the Rollers

• If the rollers are dirty, clean them with a lint-free cloth and a mild cleaning solution.
• If they look cracked or hardened, they can be replaced.

 
Perform a Hard Reset

• I would unplug the printer from power and wait about 10 minutes.
• Could you plug it back in and power it to see if the error clears?

 
Update the Firmware

• Go to Epson's support page (https://www.epson.com/Support) and look for firmware updates.
• If you're offered, you can install the latest update (the reason is that newer firmware can sometimes resolve stubborn error messages).

 
Run the Printer Without Paper

• Print Job to Empty Tray All Paper
• No paper pitfall is a sensor malfunction since it remains after being removed from the paper.

 
Addressing Error Code 31
Standard Error 31 means a problem with the printhead movement/position. Here's what to check:

• Was the printhead able to freely go after shutting down the printer and moving the printhead manually
• When the printer initializes, listen for unusual noises — grinding or clicking sounds can indicate a mechanical problem.
• If the printhead seems stuck, look for any blockage in its way.

 
When to Get Professional Help
If the above steps don't solve the problem, you may need to take it to a professional repair service. We offer on-site printer diagnostics and repair services at BCH Technologies (https://bchtechnologies.com/printer-repair-service). As we operate on a first-come, first-served basis (especially at peak periods due to high orders), we can wait before we can start working on your printer. We offer comprehensive unit repairs and piece replacements, but they are not necessarily the cheapest options. If you want to troubleshoot yourself, visit our YouTube for some troubleshooting videos (https://youtube.com/@bchtechnologies). Go to our channel page and use the search icon beside "About" to search for relevant content.
Once again, thanks for getting in touch! If you face the same issues with your Epson ET-8550, this guide will point you in the right direction. Feel free to let us know if you have any additional questions, and thanks for your continued support!