Question about Xerox WorkCentre Pro 423 Copier

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My machine shows a U4 code

My machine is Xerox WorkCentre Pro 420. It is a copier and Printer (2in1). what could be it proble. I reffered to its user Manual but only I could see was code U2.

Please advice on how i could erase this code.

my email address is ntobaki@webmail.co.za







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U4 code refers to a fuser heat failure, you'll probable find the fuser roll is stone cold .Possible cause is open circuit heater or overheat thermostat popped.Either way you will need to pull out the fuser unit and check continuity of the components

Posted on May 29, 2008

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A U4 is a fuser overtemperature.
You can hold down the "0" while powering the machine on. That will enter the machine into diagnnostics.
Next enter code 401, and press start, See of that clears the problem.
If it does. Remove the fiser and clean the buildup off the thermistor.
If it doesnt you will most likely have to replace the fuser.

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