The fuser unit or fuser assembly, is a critical component of your laser printer. Using pressure and heat, it fuses the toner powder onto the page to create a print, and without out it, your printer cannot operate. Frequent printing will eventually cause the fuser unit to wear out, at which point it will need to be replaced. Most printers will inform you when it is time to replace the fuser, however repeated lines on your pages may be a good indicator. Consult your printer’s user guide for specifics on your machine. Some fuser assemblies are sold individually or they could be included in your printer’s maintenance kit, depending on the printer model.
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