Brother Printer Error 8C — What It Means & How to Fix It

What Does This Error Mean?

Error 8C on Brother laser printers means the printer cannot recognize the drum unit or the toner cartridge inside it. The drum unit is the cylindrical component that transfers toner onto the page. This error usually appears after installing a new drum unit or toner, when the reset procedure was not completed correctly.

Affected Models

Brother HL-L2350DW
Brother HL-L2390DW
Brother MFC-L2710DW
Brother DCP-L2550DW
Brother HL-L2370DW

Common Causes

A new drum unit was installed but the drum counter was not reset on the printer
The toner cartridge is not seated correctly inside the drum unit
The drum unit protective cover or shipping seal was not fully removed before installation
The contact points between the drum unit and the printer are dirty or oxidized
A third-party drum unit is installed and its chip is not being read correctly by the printer

How to Fix It

Open the front cover of the printer. Remove the drum unit and toner cartridge assembly. Pull it out gently straight toward you.

The drum unit and toner cartridge usually come out together as one assembly on Brother laser printers.
Separate the toner cartridge from the drum unit by pressing the release lever. Reinsert the toner cartridge firmly back into the drum unit until it clicks. Make sure it is fully seated.

A toner cartridge that is not fully locked into the drum unit will cause the printer to report an unrecognized consumable error.
Check the drum unit for any protective film, orange shipping tabs, or plastic seals. New drum units ship with protective covers that must be removed before use. Check the ends of the drum cylinder and the contact areas.

A thin strip of protective plastic over the drum contacts is easy to miss and will prevent the printer from reading the drum.
Reinsert the drum and toner assembly into the printer. Close the front cover. If the printer prompts you to reset the drum counter, select Yes. If it does not prompt you, manually reset the counter.

To manually reset the drum counter on most Brother models: open the front cover, hold the OK button for several seconds until the display asks you to confirm the reset.
If the error still shows, use a dry lint-free cloth to gently clean the contact strips inside the printer where the drum unit connects. These are usually small metal spring contacts on the left side of the drum cavity.

Toner dust on the contacts is a common cause of read errors on drum units.

When to Call a Professional

Error 8C is almost always a user-correctable issue related to installation or the drum counter reset. If the error persists after trying genuine Brother consumables with the counter properly reset, the drum detection contacts inside the printer may be damaged. A Brother-authorized service technician can inspect and clean or replace the internal contacts.

Frequently Asked Questions

Do I have to reset the drum counter every time I install a new drum unit?

Yes — resetting the drum counter is a required step every time you install a new drum unit. If you skip it, the printer keeps tracking the old drum's usage and may show errors or incorrect life estimates. The reset tells the printer to start counting from zero for the new drum.

My drum is brand new. Why is the printer saying it cannot read it?

Check for leftover protective packaging. New drum units often have a small plastic tab or strip covering the contacts or the drum surface — if these are not removed, the printer cannot read the drum. Also make sure the toner cartridge is fully clicked into the drum unit before inserting them.

Can I use a non-Brother drum unit without getting errors?

Third-party drum units work on many Brother models, but some printers show compatibility errors depending on the chip quality. If the error appears specifically after installing a non-Brother drum, try a genuine Brother drum to confirm whether compatibility is the issue. Genuine Brother drums avoid this problem entirely.