'H2' indicates a problem with the thermistor (temperature sensor) in the fuser unit.
You can try resetting the code using the following key sequence:
C, [Pause key], 0, [pause key] - You need to press these keys in sequence within 5 seconds.
The display will change. Enter 14 then press the copy button.
The machine will then reboot.
Hopefully the machine will now work. If the code comes back make sure that the fuser unit is properly inserted. Check that there is no jammed paper blocking the connector. Locate the Thermistor and check that it is not damaged (hard toner can build up on it causing damage).
Hope this helps.
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