Quoted from mbwalker:The newer Enders (with upgraded motherboard) have the thermal runaway feature enabled by default. Thermal runaway can happen when the thermal sensor fails, so the heater goes full blast thinking its not heating up enough. End result could result in a fire.
Just for clarification here, on the Ender (at least on my Ender 5 Pros), when thermal runaway occurs, it shuts off the heating elements so that it DOESN'T start a fire. It also lets out a loud & steady alarm tone that you can hear from far away so you'll know to go address it. I've had this occur when the thermocouple or heating element go bad -- which are relatively easy and inexpensive to replace.
South Haven, MI
Dunakeszi
