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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.
There is a problem with the fuser unit , H2 means thermistor open or not connected, H4 means low temperature or fuser lamp not working. Reset with by pressing ; # , Interrupt , C , Interrupt. Display will go off then enter 14 and press Print key.
To enter the serviceman simulation mode, press the keys as follows: Clear → Density select → Clear→ Density select To cancel the simulation mode, press the clear key. Then enter code 14 then hit start.
H2-0 Fusing unit temperature error
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. 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.