Which info did you get ‘second hand’ you don’t mean THIS by any chance.
99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of the time its either the heater or the PCB. Test the heater first then make sure you get the correct serial number if the heater is OK, there are a couple of different PCB’s.