My printer just caught on fire.

Smoke started pouring out of the electronics box in between prints. Waiting for it to cool down before I investigate further. Anything like that happen to anybody? It’s been fine for almost two years.

Usually the fuses would blow before fire would occur. It’s a very rare failure for what it’s worth.

Found the culprit.

Is this an easy fix? I also kind of want to know WHY that would happen, you know, so I feel better about not burning my house down.

That’s your heaTed been wire harness. I’m guessing there is a short or a loose wire there or possibly in the wire harness that leads from the control box to the bed. You can see how it looked prior to that here

https://ohai.lulzbot.com/project/56d485b2-9026-452c-bf25-740423b4e7b2/taz-4/

I do wonder if your heated bed might have a loop burned out which happens sometimes. You can get the heated bed wire harness from itworks3d.com. if it were me, I would replace the bed with a taz5 spec bed with the pei sheet to be safe along with the harness wire.

https://itworks3d.com/product-category/parts/taz-4-5-parts/

Thanks for all of the info. I’ve been debating upgrading to the PEI, and this may be the final reason I do it, but I have had zero issues with PET like other users (and I still have 2 or 3 PET sheets left).