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Brother Waster Toner box model WT-223CL. Printer is DCP-L3551CDW color laser. Problem: Readout says Waste Toner box is full, or near full, when it's actually empty.There's a lot of conflicting information on YouTube about this problem but I've yet to find the correct fix. Anyone?
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@egelbart sounds like you may have issue with the Waste toner sensor. It detects a certain amount of waste toner in the waste toner box. So, if your repeat message says it s full but in reality it is not, then this would be my prime suspect. Make sure that you reset the "sensor" which is really nothing but a simple switch. Check something like this video for seeing how to do that. Also check and clean the contacts etc. as seen on page 114 of the SM
Use the Brother Dcp 9030cdn L3510cdw L3517cdw L3550cdw L3551cdw Hl L3290cdw Mfc 9150cdn 9350cdw L3710cw L373 for the rest of the SM for the printer.
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Thanks for the tip.
Is that a manual your link is pointing to?
I can't seem to make it work.
@egelbart yes, that is the service manual for those printers. It does not download when you click on it? I did UL to this page Brother Printer under the Documents header
OK, I have the pdf but when I click to open it, all I see is a menu that appears to have been inserted by IFIXIT. Nothing on the menu opens the file.
AI tells me that what I've downloaded (83k) is just the menu, not the 28MB manual.
@egelbart all you should have to do is to click on the blue link in my answer. Once it open in the internal viewer you can click on the three dots on the right beside the magnifying glass and choose download. Just checked it and it does work for me.
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Hi Egelbart,
This is a very common frustration with Brother color laser printers like the DCP-L3551CDW.
Here is the exact reason why this happens and how to fix it permanently:
Brother waste toner boxes (such as the WT-223CL) do not have an optical or weight sensor inside them. The printer's firmware simply estimates waste toner accumulation based on a page-count and rotation algorithm. When the internal counter hits its threshold, the printer locks out and flags the box as "Full"—even if you emptied it or it looks mostly empty.
Furthermore, if you just empty the box manually without resetting the internal flag or software counter, the printer has no way of knowing you fixed it.
Here are the two ways to resolve this:
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You can manually force the printer to clear the waste toner counter through its service routine:
1. Turn on the printer.
2. Open the front cover (where the toner cartridges and waste box are accessed). Leave the cover open during the next steps.
3. Press the Cancel button (the 'X' or stop button) and the Secure Print (or Back/Home button depending on the exact firmware touch panel variant) simultaneously, or press and hold the (Star)** key if it has a numeric keypad, OR*** on the touch panel models:
Press and hold the lit *Power/Home** area or look for a hidden Reset Menu prompt:
4. The display will show the reset menu for consumable parts (Drum, Belt, Waste Box).
5. Select Waste Box (or WT-BOX) and confirm the reset by selecting Yes or pressing 1.
6. Close the front cover. The error message should immediately disappear, and the counter will reset to 0%.
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If you opened and emptied the OEM WT-223CL box yourself:
1. Look at the side of the waste toner box housing. There is a small plastic spring-loaded gear or reset flag/lever.
2. When the box is inserted into the printer, this flag rotates and physically trips a microswitch inside the printer cavity to tell the main board a new box has been installed.
3. If this gear is stuck, jammed with toner dust, or didn't spin back into its home position when you emptied it, the printer will keep throwing the error.
4. Manually wind/reset the side gear back to its starting position before sliding the box back into the machine.
Once you execute the manual LCD reset (Method 1), the printer will clear the error instantly!
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@zstrayaneh we have one rule about the use of AI on Answers. AI-generated answers are generally tolerated, but we require transparency from the poster. You must disclose within your answer that an AI tool was used. We don't care if you use AI but be transparent.
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Thanks for the information. Unfortunately, my New Zealand version of the DCP-L3551CDW color laser doesn't have the controls you described, see photo. I assume that somewhere in the machine will be a way of resetting the page counter back to zero, but I haven't been able to find it.
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