Epson WF-3820 Not Recognizing Remanufactured Ink After a Firmware Update: Can Refillable Cartridges Be Used?

Question

About a week ago, our Epson WorkForce Pro WF-3820 stopped recognizing its ink cartridges after a firmware update. We had used remanufactured cartridges in this printer for more than a year without any problems.

We purchased another set of remanufactured cartridges, but the printer will not recognize those cartridges either. Can we purchase chip-ready refillable cartridges for the WF-3820 and fill them with the refill ink we already have? What would you recommend in this situation?

Answer

Why the WF-3820 Stopped Recognizing the Cartridges

Because the problem began immediately after a firmware update, the most likely issue is cartridge-chip compatibility rather than the ink inside the cartridges.

The chip on each cartridge communicates information to the printer, including the cartridge type, color, region, ink status, and other authentication data. A remanufactured cartridge may work correctly for months or years because its chip is compatible with the printer's existing firmware. However, a later firmware version may change how the printer reads or validates that chip.

When that happens, the printer may display a message such as:

• "Ink cartridge is not recognized"

• "Cannot recognize the ink cartridge"

• "Replace the ink cartridge"

• "Cartridge not installed correctly"

• "Use genuine Epson ink cartridges"

No numerical error code was included in the question. This appears to be a cartridge-recognition message rather than a numbered mechanical or electrical error code.

Epson's official guidance specifically addresses situations in which ink is no longer recognized after a firmware update. Epson states that the WF-3820 is designed for genuine Epson-brand cartridges and recommends replacing unrecognized third-party cartridges with genuine Epson cartridges. You can review Epson's official firmware and ink-recognition guidance [https://epson.com/faq/SPT_C11CJ07201~faq-0000bd0-shared].

Can You Purchase Refillable Cartridges for the WF-3820?

Aftermarket refillable cartridges are advertised for the North American Epson 822 and 822XL cartridge family used by the WF-3820. Some use replaceable single-use chips, while others are marketed for use with modified or "chipless" firmware. Therefore, it would not be accurate to say that refillable cartridge bodies are completely unavailable. However, their availability does not mean they will work with every WF-3820 or every firmware version.

The Epson WF-3820 sold in North America uses Epson 822 standard-capacity or 822XL high-capacity cartridges. Epson lists the following cartridge family for this printer:

• T822120 or T822XL120 for black

• T822220 or T822XL220 for cyan

• T822320 or T822XL320 for magenta

• T822420 or T822XL420 for yellow

These cartridge numbers are shown on Epson's official WF-3820 ink page [https://epson.com/InkFinder/i/C11CJ07201].

The problem is that a refillable cartridge still needs a compatible chip unless the printer has been converted to use unofficial chipless firmware. If your newly updated printer already rejects a new set of remanufactured cartridges, another set of refillable cartridges with older or incompatible chips may produce exactly the same recognition problem.

Before purchasing refillable cartridges, you would need the seller to confirm all of the following:

1. The cartridges are specifically made for the North American WF-3820 and the 822 or 822XL cartridge system.

2. The chips are compatible with the exact firmware version currently installed on your printer.

3. The chips are new, functional, and have not previously been marked as depleted.

4. Replacement chips will remain available after the cartridges report empty.

5. The seller will accept a return if the printer does not recognize them.

A general statement such as "compatible with the WF-3820" is not enough. The firmware revision and regional cartridge version can be just as important as the printer model.

Why "Chip-Ready" Does Not Always Mean Reusable

The phrase "chip-ready" can be confusing. It may describe an empty refillable cartridge body with a place to install a chip, but it does not necessarily mean that the included chip can be reset and reused indefinitely.

Some aftermarket systems use one-time chips. You can refill the physical cartridge, but once the chip reports empty, you must replace the chip before the printer will accept the cartridge again. Other products may use auto-reset chips, but those chips can still become incompatible following a firmware update.

Therefore, you should determine whether the product includes:

• A one-time chip

• A replaceable chip

• An auto-reset chip

• No chip at all

• A requirement for unofficial chipless firmware

Without that information, you could purchase refillable cartridges and still be unable to use them.

Checks You Can Perform Before Replacing the Cartridges Again

Although the timing points strongly toward a firmware compatibility issue, it is still worthwhile to eliminate basic installation problems.

Confirm that the new cartridges are labeled for Epson 822 or 822XL and specifically list the WF-3820. A cartridge intended for another region may look physically identical but use a different chip.

Next, verify that the yellow protective tape has been removed from each cartridge. Remove only the tape specified by the cartridge manufacturer. Do not remove labels or seals that control the cartridge's venting system unless the instructions specifically tell you to do so.

Turn the printer on and use the printer's cartridge-replacement menu to move the carriage into the correct position. Remove and reinstall all four cartridges, pressing each one down until it clicks securely into place. Epson advises against manually forcing the printhead carriage and cautions users not to touch the green cartridge chips.

Inspect the cartridge chips for fingerprints, ink, scratches, corrosion, or misalignment. Also look at the printer's chip-contact pins without bending or touching them. A damaged cartridge chip or bent contact can prevent recognition, although it would be unusual for two complete sets to fail immediately after the same firmware update.

After reseating the cartridges, turn the printer off normally, unplug it for several minutes, reconnect it, and restart it. This can clear a temporary communication problem, but it will not reverse the firmware update or restore compatibility with a blocked cartridge chip.

Our Recommendation

BCH Technologies does not sell Epson OEM cartridges, remanufactured cartridges, refillable cartridges, replacement cartridge chips, or chipless firmware for this model. Because we are not actively involved in that portion of the cartridge industry, we cannot certify which current aftermarket chip revision will work with your printer's newly installed firmware.

For the most reliable and lowest-risk solution, we recommend purchasing genuine Epson 822 or 822XL cartridges from Epson or an established authorized retailer. This is also Epson's official recommendation when cartridges stop being recognized following a firmware update.

We would not recommend purchasing another generic remanufactured or refillable set unless the seller can specifically guarantee compatibility with your exact firmware version and provide a reasonable return policy. The fact that two sets are now unrecognized suggests that simply changing cartridge brands may not solve the underlying chip-authentication problem.

We also do not recommend attempting unofficial firmware modification or firmware downgrading unless you fully understand the risks. Installing unofficial firmware can introduce additional problems, and an interrupted or incompatible firmware installation may leave the printer unable to start normally. BCH Technologies cannot verify, install, troubleshoot, or support a chipless conversion for the WF-3820.

Your existing refill ink may still be useful for another printer or cartridge system designed to accept that particular ink. However, putting the ink into a refillable WF-3820 cartridge will not solve the recognition problem unless the cartridge also has a chip that the printer accepts. The printer validates the cartridge electronically before it can use the ink inside it.

Addressing printer problems can be complicated because many diagnoses and repairs require direct, hands-on inspection. For that reason, we are unable to provide individualized remote troubleshooting, repair suggestions, or technical support for printer repairs. We do offer in-person evaluation and repair through our local printer diagnostic and repair facility [https://bchtechnologies.com/printer-repair-service].

Because demand for this service is high, appointments and printer drop-offs are handled on a first-come, first-served basis, and the waiting period may be several weeks. Our services can address either an entire printer or certain repairable components, and the service page explains how to proceed. We also recognize that professional diagnostic and repair services may not be the most economical option for every printer.

For that reason, we strongly encourage customers to continue researching the issue independently. You can begin with YouTube or visit the BCH Technologies YouTube channel homepage [https://youtube.com/@bchtechnologies]. To locate a particular topic, use the search icon beside the "About" section on the right side of the channel's menu bar. We receive dozens of requests each day asking whether we have made a video about a specific printer problem. Since we have produced repair videos for more than nine years, it is difficult to remember every video individually. Using YouTube's channel-search function is usually the fastest method, and YouTube may also recommend helpful videos from other repair channels.

Thank you again for contacting BCH Technologies and for taking the time to explain what happened after the firmware update. We sincerely appreciate your support and hope this information helps you avoid purchasing another cartridge system that may not be compatible with your WF-3820.