Question about OKI C5100n Laser Printer

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Our OKI C5100 is showing 171:Fatal error. What should we do?

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The 171 Fatal error:

Upper Thermistor, State:Open

When an open circuit has been detected in the heat roller thermistor (low temperature)

Check the heater connector and the thermistor connector to make sure they are seated properly. If OK you probably need to replace the fuser.

Hope this helps.

Posted on Sep 03, 2009

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