Updated: May 26, 2020
Top 5 Symptoms of a Bad Fuser
While every printer model is different and many show different problem, these are the most common symptoms of a bad fuser.
The fuser is a part of laser printers that bonds the toner and paper together using heat and pressure. Fusers need to be replaced every 75,000 - 300,000 pages depending on the printer model. The following are the 5 Top Symptoms of bad fusers.
1. Noise Coming From the Fuser Area
Humming Printer Noise - This occurs just prior to the gear being completely worn. As the drive gear starts to wear out, you will hear hum or drone. Remember: The hum comes before the grind.
Grinding Printer Noise- This can come from the printer's swing plate, main drive assembly or the fuser. Regardless of which one is causing it, they both should be replaced. Once either is compromised it will damage the other so its best to replace both.
Chirp or Squeaking Printer Noise- This occurs when a shaft or roller in the fuser rotates inside of a worn or damaged bushing. When it spins and hits that worn section of the bushing, it makes a noise. This is also can come from delivery rollers located in the printer fuser. Fusers made with inferior bushings can wear out in the critical areas. Older laser printers utilized hot rollers instead of fuser film sleeves which experience this same phenomenon.
Newer laser printers have diagnostic service modes that can run the fuser motor to help you isolate these noises.
2. Image Defects
A lot of things can cause image defects however these are the top causes of fuser related image defects in office laser printers.
Darker gray (not black) vertical lines down the page can indicate a ripped or worn fuser film sleeve.
Repeated images / Ghosting may be due to wear found on the fuser film.
Toner rubbing off can be caused by a user not selecting the correct printer temperature setting to match the paper's weight or characteristics. If it is set to the correct temperature it may be times to change the fuser.
Poor quality toner with an inconsistent melting point can also cause toner to rub off pages.