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Should probably read H2-00, which is your thermistor in the fuser. Open door on right, three screws hold the fuser in (hot bit), release fuser slightly, being careful as it is still connected, the thermistor is sat in the top, you should be able to reset it by pressing the little button and you should here it click. re-fit fuser and secure.
To reset the code, press these buttons:
Hash, interrupt, clear, interrupt., enter 14, then the print button.
Your error code indicates that the Fuser is not at the correct temperature, which can lead to smeary smudgy copies or scorched paper and a fire hazard, depending upon whether the fuser is too cold or too hot.
Sharp Fuser H2-0 Fusing unit
H4-0 The fusing unit doesn't heat up.
***ALWAYS DISCONNECT POWER WHEN WORKING
ON MACHINE*** You have to reset fuser errors with simulation 14.
Push P * C * then 14 then Start (the button you use to make copies)
and it should reset the code. If not then replace the fuser. SM
5-1 should turn the lamp on. If lamp blinks on and off it is the
thermistor, if it does not it is the lamp, but check the contacts on
the lamp/fuser -- they have been known to erode.
Also check thermal fuse, if defective
Sounds like a tough one, take off the back cover and make sure all connectors are making good contact. You may have a fault in the main logic board.
This might need a tech to check out.
Hope that helps...
You have a thermistor open. That means that the device that reads the temperature in the fusing unit, has broken. You will need to replace the fusing unit to fix this problem. You could try a Sim 14 reset. Push P * C * then 14 then Start (the button you use to make copies) and it should reset the code. If not then replace the fuser.