Once the box is full, the printer stops functioning to prevent waste ink from leaking inside the machine and causing a catastrophic electrical short or mechanical failure. When the printer warns you that the box is full, Epson’s official solution is to buy a brand-new original C9345 maintenance box. While these aren’t astronomically expensive, the costs add up over the life of the printer—especially if you run frequent head cleanings.

Always check the physical waste ink level before resetting. A resetter fixes the counter, not the leak.

If you prefer a "set it and forget it" experience, simply buy a new original C9345 box. But for the budget-conscious or environmentally aware user, the $10 resetter will pay for itself after the first reuse.

While replacing the maintenance box is the standard solution, many users are discovering a cost-effective alternative: the . But what exactly is it, and should you use it? What is a Maintenance Box? Before understanding the resetter, you need to understand the box itself. The Epson L6170 uses a replaceable Maintenance Box (Part Code: C9345) .

However, even the best printers have consumables that need attention. One of the most confusing—and frustrating—messages you will eventually see on your screen is: