Samsung ProXpress M453x series Service Manual page 191

► Error Code
U1–2112 / U1–2120 / U1–2132 / U1–2135 / U1–23xx
► Error message
Fuser unit Failure: #U1-2xxx. Turn off then on. Call for service if the problem persists
► Symptom
The temperature control of fuser unit is abnormal. (Open Heat Error or Low Heat Error or Over Heat Error) / Thermistor
is defective. / Fuser unit connection is bad.
► Troubleshooting method
CAUTION
The temperature gets hot around the fuser unit. To prevent burns, make sure the fuser unit area is cool before
performing this procedure.
1) After checking the fuser installation, turn the machine off then on.
2) Open the rear cover. Lift up the right side and release the rear cover.
3) If there is no problem, remove 4 screws.
4) Lift up the both levers. Then take off the fuser unit.
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4. Troubleshooting
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