Thanks. I've tried the fan as low as 25% with the same issue. I'm using a fully circular fan shroud off thingiverse. There's no restore factory defaults setting in my printers menu. There is a reset button on the main board but I think that that's more of an emergency stop. Can I just put M502 and M500 in a text file and run it on the printer or how do I do that? Maybe if I restore the defaults and set the max fan to 50% it will fix my problem. It's worth a try.