My copier is flashing the code H4

press # * C * the machine will enter diagnostics. Then enter 14 and follow the directions to clear an H4 code.

RePlace the FUSER

The H4 code indicates the fuser may have blown the thermistor. It also could be a false error code. Try this series to clear the error and if it returns, then you'll know for sure the fuser is the culprit. To reset press the following buttons:

1. Press this sequence: CLR-Exposure-CLR-Exposure
2. The display will go blank
3. enter "14", press "PRNT"
4. Press "CLR" several times to exit.

Give that a try and good luck.

Hello sir;Follow these steps within 4 seconds; press 'clear', "exposure" ,"clear" "exposure" then enter 14 hit print, should be OK.

See my tips and tricks solution for this problem on this site. Just search for Sharp AL series H4

The fuser codes are only H2,H3 and H4. To reset , press C, Exposure, C, Exposure.Display goes off enter 14 press print.

Hello sir; You do need following procedure to reset; once begun procedure must enter within four seconds; Press "clear", "exposue mode", "clear", "exposure mode" these 4 keys within 4 seconds, then enter 14, then press start, should take care the problem.

It probably the toner cartrisge is empty or if there's an error code H4, the heater lamp is spoiled

Try to reset the error code by pressing : C exp1 C exp1 14 start. if the problem still occur then you should change the heater lamp

Fuser is not heating up. Normally a broken bulb.

Unless you can get hold of spares, call the engineer.