Xerox Workcentre 3210, 3220 System Error Cycle Power or Fuser Error

Once in a while one of the thermostats in the fusing unit gets stuck in the open position resulting in a system error cycle power or fuser error on a Xerox Workcentre 3210, 3220 . When the fuser reaches an overheat level the thermostat opens like a fuse and opens the AC voltage going to the fuser resulting in a fuser error or after start-up a System Error Cycle Power Message on the display. The thermostat is supposed to reset itself once it cools off but in some cases it sticks open and has to manually be reset. In this article I’ll explain why the Xerox Workcentre 3210, 3220 System Error Cycle Power or Fuser Error happens and how to fix it.
Xerox Workcentre 3210 / 3220 Fuser Unit, 126N00330, JC96-05133A 

1. Remove the Duplex Unit.
2. Remove the Rear Cover.
3. Remove the Rear Guide Unit.
4. Disconnect the wiring harness connector CN53
5. Remove 4 screws (12 mm, silver) that secure the Fuser.
6. Pull the Fuser out from the printer.
7. Remove 2 screws (10 mm, black) that secure the Thermostat on top of the fuser.
8. Lift the Thermostat away from the fuser cover.
9. Disconnect the wiring harness connectors CN49 & CN50 from the Thermostat.
10. Remove the Thermostat.

If one is stuck when you press down on the two thermostats you will notice that one depresses and springs back making a clicking sound while the other stays down. If you have a volt meter with a continuity test option if both thermostats are closed you should be able to put the leads on either side and have continuity. If not, then you know for sure one of them is not working correctly. Take a can of canned air and hold it upside down while spraying the thermostats and you should hear one pop back into place or if you depress them again they should act the same way. All were doing here is giving it an extra shot of very cold air so it resets the way it should have. Reinstall the thermostat,  fuser,  the covers and you should be good to go. More and more machines are using these thermostats becuase in theory they reset themselves rather than having to replace. I’ve seen them on Dells, Brothers, and Samsungs. If you have any questions feel free to send me an email and I’ll help you walk through the procedure.