Unfortunately there is no test for the fuser, besides replacing it to see if it fixes the issue. I suggest calling into the support department 1-800-821-2797 to see if it's defective.
Recently we started having small thin redish streaks on our pages. Using the Reporting Defects page it looks to be spaced at 94mm. Is there a way to test if it's the fuser or the imaging unit? Attached is an image of what it looks on the page. Is there a temporary fix for this to get a few pages printed? Everything else looks good.
Thanks in advance!