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H2 deals with the fixing unit.... You need to fix the problem before it can be rest. It may just be the fuser lamp is blown. You have to take it out and if it looks like a candy cane that is the problem. Good Luck
reset error using simulation mode 14 & 16. this is occur due to fusing thermistor is open. still occur remove fusing unit & clean
thermistor using alcohol & reset thermostat. then fix it & again reset error using simulation mode 14 & 16. still h2 appear replace old one to new 1.
When the light flashes it means you have a catalytic damaging misfire happening.. Most likely a coil or spark plug issue but could be something else. Get it fixed ASAP because if you toast your cat its going to get expensive
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
An H2 is an indicator that the temperature sensing device is reading open, preventing the machine to warm up. There is only one way to correct this and that is to replace the thermistor, and that takes a technician. Not a hard job but a novice could get into trouble and make matters worse.