If your brooder heater stops working, you can change the fuse. The fuse box is located underneath your white dial near the electrical cord input. You will see raised lettering and a small box sitting flush. You will need a flat head screw driver to slide the fuse box out like a DVD. The fuse box will not come out all the way. There will be a fuse that is being used and a replacement fuse. Swap the places of the fuses and close the fuse box. If you have any questions or need further troubleshooting, please call us at (800) 511-1369.