Brother HL-L2350DW and HL-L2370DW error codes and messages: what each one means
27 codes and messages of the Brother HL-L2350DW and HL-L2370DW, from Brother’s own guide Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL). Mono laser with a one-line LCD that shows a short message (Jam Inside, Drum !, Toner Low) instead of LED patterns.
Models covered, as Brother lists them: HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL.
The lights on this printer
- LCD (one line of text)
Our own schematic drawing, not Brother’s panel layout: the lights are in the order Brother’s guide lists them. Where Brother does not give a light’s colour, it is drawn filled in the text colour.
2-sided Disabled on the LCD
LCD (one line of text) on; display shows “2-sided Disabled”. Colour not stated by Brother.
Brother gives 2 causes for this pattern; the message on the computer or the printer software tells them apart.
The back cover is not closed completely.
What Brother says to do
- Close the back cover until it locks.
The 2-sided tray is not installed completely.
What Brother says to do
- Install the 2-sided tray firmly in the machine.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Cartridge Error on the LCD
LCD (one line of text) on; display shows “Cartridge Error”. Colour not stated by Brother.
The toner cartridge is not installed correctly.
What Brother says to do
- Take out the toner cartridge and drum unit assembly, take the toner cartridge out of the drum unit and put it back, then reinstall the assembly.
- If the problem continues, contact Brother Customer Service or your dealer.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Cooling Down on the LCD
LCD (one line of text) on; display shows “Cooling Down”. Colour not stated by Brother.
The inside of the machine is too hot; it pauses the current job and cools down.
What Brother says to do
- Wait until it has cooled down and keep all vents clear; it then resumes printing.
- If the fan is not spinning, unplug the machine for several minutes, then plug it back in.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Cover is Open on the LCD
LCD (one line of text) on; display shows “Cover is Open”. Colour not stated by Brother.
Brother gives 2 causes for this pattern; the message on the computer or the printer software tells them apart.
The front cover is not completely closed.
What Brother says to do
- Open and then firmly close the front cover.
The fuser cover is not completely closed.
What Brother says to do
- Close the fuser cover, inside the back cover of the machine.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Drum ! on the LCD
LCD (one line of text) on; display shows “Drum !”. Colour not stated by Brother.
Brother gives 2 causes for this pattern; the message on the computer or the printer software tells them apart.
The corona wire on the drum unit must be cleaned.
What Brother says to do
- Clean the corona wire on the drum unit.
- If the problem continues, replace the drum unit.
The drum unit, or the toner cartridge and drum unit assembly, is not installed correctly.
What Brother says to do
- Remove the drum unit, take the toner cartridge out and put it back in, then reinstall the drum unit.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Drum End Soon on the LCD
LCD (one line of text) on; display shows “Drum End Soon”. Colour not stated by Brother.
The drum unit is near the end of its life.
What Brother says to do
- Order a new drum unit before the LCD shows Replace Drum.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Jam 2-sided on the LCD
LCD (one line of text) on; display shows “Jam 2-sided”. Colour not stated by Brother.
Paper is jammed in the 2-sided tray or inside the back cover.
What Brother says to do
- Remove the 2-sided tray and open the back cover to pull out all jammed paper.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Jam Inside on the LCD
LCD (one line of text) on; display shows “Jam Inside”. Colour not stated by Brother.
Paper is jammed inside the machine.
What Brother says to do
- Open the front cover, remove the toner cartridge and drum unit assembly, and pull out all jammed paper. Close the front cover.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Jam Rear on the LCD
LCD (one line of text) on; display shows “Jam Rear”. Colour not stated by Brother.
Paper is jammed in the back of the machine.
What Brother says to do
- Open the fuser cover and remove all jammed paper. Close the fuser cover.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Jam Tray 1 on the LCD
LCD (one line of text) on; display shows “Jam Tray 1”. Colour not stated by Brother.
Paper is jammed in the paper tray shown.
What Brother says to do
- Pull out that paper tray and remove all jammed paper.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Manual Feed on the LCD
LCD (one line of text) on; display shows “Manual Feed”. Colour not stated by Brother.
Manual was chosen as the paper source in the printer driver, but there is no paper in the manual feed slot.
What Brother says to do
- Put paper in the manual feed slot.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Media Mismatch on the LCD
LCD (one line of text) on; display shows “Media Mismatch”. Colour not stated by Brother.
The media type set in the printer driver differs from the paper type set in the machine’s menu.
What Brother says to do
- Load the right paper in the tray shown, then set the matching media type in the machine’s Paper Type setting.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
No Drum Unit on the LCD
LCD (one line of text) on; display shows “No Drum Unit”. Colour not stated by Brother.
The drum unit is not installed correctly.
What Brother says to do
- Reinstall the toner cartridge and drum unit assembly.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
No Paper on the LCD
LCD (one line of text) on; display shows “No Paper”. Colour not stated by Brother.
The machine is out of paper, or paper is not loaded correctly in the tray.
What Brother says to do
- Refill the tray and set the paper guides to the paper size. If there is paper, take it out and load it again; do not overfill the tray.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
No Paper T1 on the LCD
LCD (one line of text) on; display shows “No Paper T1”. Colour not stated by Brother.
The machine failed to feed paper from the tray shown.
What Brother says to do
- Refill or reload that tray and set the paper guides to the paper size; do not overfill it.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
No Toner on the LCD
LCD (one line of text) on; display shows “No Toner”. Colour not stated by Brother.
The toner cartridge, or the toner cartridge and drum unit assembly, is not installed correctly.
What Brother says to do
- Take out the assembly, reinstall the toner cartridge in the drum unit, and put the assembly back.
- If the problem continues, replace the toner cartridge.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Out of Memory on the LCD
LCD (one line of text) on; display shows “Out of Memory”. Colour not stated by Brother.
The machine’s memory is full.
What Brother says to do
- Press and hold Go for about two seconds, and lower the print resolution.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Print Data Full on the LCD
LCD (one line of text) on; display shows “Print Data Full”. Colour not stated by Brother.
The machine’s memory is full.
What Brother says to do
- Press and hold Go for about two seconds, and delete the print data stored earlier.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Print Unable ## on the LCD
LCD (one line of text) on; display shows “Print Unable ##”. Colour not stated by Brother.
The machine has a mechanical problem.
What Brother says to do
- Press and hold the power button to turn the machine off, wait a few minutes, and turn it on again.
- If the problem continues, contact Brother Customer Service.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Replace Drum on the LCD
LCD (one line of text) on; display shows “Replace Drum”. Colour not stated by Brother.
Brother gives 2 causes for this pattern; the message on the computer or the printer software tells them apart.
It is time to replace the drum unit.
What Brother says to do
- Replace the drum unit with a new one.
The drum counter was not reset when a new drum unit was installed.
What Brother says to do
- Reset the drum unit counter, following the instructions that come with the new drum unit.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Replace Toner on the LCD
LCD (one line of text) on; display shows “Replace Toner”. Colour not stated by Brother.
The toner cartridge is at the end of its life. The machine stops all print operations.
What Brother says to do
- Replace the toner cartridge with a new one.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Self-Diagnostic on the LCD
LCD (one line of text) on; display shows “Self-Diagnostic”. Colour not stated by Brother.
The fuser unit does not heat to the set temperature in time, or it is too hot.
What Brother says to do
- Press and hold the power button to turn the machine off, wait a few seconds, and turn it on again.
- Leave the machine on and idle for 15 minutes.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Size Error DX on the LCD
LCD (one line of text) on; display shows “Size Error DX”. Colour not stated by Brother.
The paper size set on the machine, or the paper in the tray, cannot be used for automatic 2-sided printing.
What Brother says to do
- Press and hold Go for about two seconds if needed, load a supported size and set the tray to it. Automatic 2-sided printing takes Letter, Legal, Mexico Legal, India Legal and Folio.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Size Error on the LCD
LCD (one line of text) on; display shows “Size Error”. Colour not stated by Brother.
The paper size set in the printer driver is not supported by the tray chosen.
What Brother says to do
- Choose a paper size that tray supports.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Size Mismatch on the LCD
LCD (one line of text) on; display shows “Size Mismatch”. Colour not stated by Brother.
The paper in the tray is not the right size.
What Brother says to do
- Load the right size of paper in the tray shown, set the tray’s paper size, and press Go.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Toner Ended on the LCD
LCD (one line of text) on; display shows “Toner Ended”. Colour not stated by Brother.
It is time to replace the toner cartridge.
What Brother says to do
- Replace the toner cartridge with a new one.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Toner Low on the LCD
LCD (one line of text) on; display shows “Toner Low”. Colour not stated by Brother.
The toner cartridge is near the end of its life. You can still print.
What Brother says to do
- Order a new toner cartridge now, so you have it when the LCD shows Replace Toner.
Source: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) (Brother), checked 2026-09-29.
Close models without a page of their own
These models’ tables repeat this one, so they are answered here; the differences Brother’s own page shows are listed.
- Brother HL-L2390DW and DCP-L2550DW — Brother’s guide for these (shared with the MFC-L2690DW to MFC-L2759DW) gives the HL-L2350DW’s printer messages in near-identical words, plus the scanner ones: Document Jam (the document fed wrongly or was too long for the ADF: remove it, clear any scraps from the ADF path, press Stop/Exit), Scan Unable XX (a mechanical problem: turn the machine off and on, and contact Brother if it stays), Cover is Open also meaning the ADF cover (close it), and Wait for a while in place of Cooling Down. support.brother.com Checked 2026-09-29.
Other Brother printers
The same light can mean something else on another Brother family, so check the model name on your printer.
Sources
Brother’s own pages only, read on the date shown. Nothing here comes from third-party “printer codes” sites.
- Brother: Online User’s Guide — Error and Maintenance Messages (HL-L2325DW, HL-L2350DW, HL-L2370DW, HL-L2370DWXL) — Brother HL-L2325DW, HL-L2350DW, HL-L2370DW and HL-L2370DWXL. support.brother.com Checked 2026-09-29.
Find a pattern by which light and how it blinks, on any brand →