Further reading on the net revealed that the fuse apparently gets worn down over time, and the higher resistance due to copper oxidation probably created more heat as well inside the fuser. Reopened the fuser cover, noticed a resistor-like device that said 'SE FUSE.' Took it out and it measured open. Put it back together, still didn't work. I sanded off the contact points until they were shiny. I opened up the cover, and noticed that the main electrical connection is a bare copper strip and had a heavy layer of oxidation. I did order a service manual, and the problem seemed to be pointed toward the fuser cover.

Following the suggestion here by replacing the thermistor did not solve the problem. Thanks to stingray for pointing me in the right direction. Replace the thermistor, reassemble and reinstall the Fuser, and you should have a working printer. You will see the thermistor attached to the underside of the top. Remove the 4 screws holding the top on and remove the top. Remove the screws holding the red and white wires to the top, and the single screw holding the heater element on the opposite side. Remove the 2 screws holding each end cap in place and while working the wires loose, remove the end caps. The Fuser is held in place by 2 black thumb screws – remove these and pull the Fuser out. To install, remove the Fuser assembly by first opening the rear door.

I found an eBay source for the thermistors - just search for N2125 thermistor. Thanks to this site, I decided to replace just the thermistors on each printer. One is several years old, but like new with only a few thousand impressions, the other purchased used with about 80,000 impressions. SKU: Epson-L850-Photo-All-in-One-Ink-Tank-Printer Categories: New Printer, Printers Tags: 55CPM, 55PPM, 65CPM, 65PPM, 75CPM, 75PPM, 95CPM, 95PPM, A0, A1, A10, A2, A3, A4, A5, A6, A7, A8, A9, advertising, Aficio, All in One, art, Best, best photostate machine, Bizhub, branding, business, Cannon, Cartridge, Cheap, colegios, consumables, copier, copier house, copier on rent, copier shop, copier store, COPIER.I had 2 N2125 printers with this problem.

Xerox fuser system error