Hey @cflanagan I'm glad to hear that you are liking the new Mattercontrol version. If you have not yet, I would upgrade to the current version which is now our fully released version. So we have found on some printers that if the heating block is not shielded, the part cooling fans can drop the temps enough to cause a thermal runaway error. So wrapping your block in a silicone sock or an insulating pad will help with this. I do agree that the printer should stop printing in the event of the error so this is something we should look into but at the very least it stopped heating! Let us know if you do run into any more issues or suggestions.