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Posted on Jan 07, 2008
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I have a xerox 5016 copier ,

I am getting u4 error can you tell me how to correct it, really old model

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Gilbert Gonzalez

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  • Expert 239 Answers
  • Posted on Oct 16, 2009
Gilbert Gonzalez
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On this model, yes it can be the fuser thermistor, fuser relay, driver board, main board, especially the fuser fan turning very slow not up to speed.
Any of these combination can be a problem.
Also, there can be bad fuser rod connections that can cause this type of problems, and can only be repaired by a Xerox Service Representative.

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  • Posted on Jan 08, 2008
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All U4 codes on Xerox machines relate to the "fuser".( That's the hot bit on the way out) You will find the rollers fail to warm up, or reach correct temperature .
Most often the heater rod inside has burned out, or sometimes the overheat thermostat goes open circuit.Both problems will require the fuser unit pulling out of the machine and a test meter to check continuity of the components

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How can fix error u4 code in xerox photocopier machine
http://xeroxmachineerrorcode.blogspot.com/2016/07/u4-error-code-xerox-wc50165020.html


Unsure what model Xerox is displaying error u4.

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I have a xerox 5016 copier ,
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Xerox Copier Machine - Error U4
The fuser is not warming up.
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It is most likely blown. Possibly caused by a jammed paper in the fuser.
That fusable link needs to be replaced.
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