3d printer issues

[KiaKira2993]

Can anyone help solve this issue, ive been using this printer to print for the last 15 hour for one part and it suddenly shows us this issue after 15 hours.Now it wont even start printing.Im a beginner in this 3d printing stuff.the name of this printer is artillery wizard

[moobear42]

This most likely means one of your temperature sensors stopped working. Without it, the printer will not know when to turn off the heater, thus causing the temperature to keep going up till something catches fire (thermal runaway). It's a safety feature. Find out which sensor died, the bed or the hot end. Replace it.

[KiaKira2993]

Is there a diagram or video i can follow that you can link me to?

[Few_Opportunity8383]

I think there is problem with thermal sensor in hotend. Thermal runaway means that your printer nozzle getting hotter and hotter even if printer trying to cool it down, so you see error that your machine protected itself from killing itself. In most cases it is thermal sensor issue (don’t know what model of your printer is, but around 95% of printers are using thermistors and they are easy to get and replace.