nad931

Hi, So I'm experiencing a problem with Ultimaker Original. Everytime I try to heat the nozzle an error message flashes on the screen saying "Heating Failed". I've changed the temperature sensor and the thermocouple but still the same problem. The heater heats up till about 37 and then it doesn't and flashes the error message. I've also checked all the connections on the board and they're all fine. Any help is highly appreciated.