Rheostat

Unplug toaster, remove cover and front panel with Philips screwdriver, remove plastic handles adjusting knobs from rheostat stems and remove rheostat by removing 2 Philips screws, take a picture for reference, using pliers remove round nut from stem on rheostat, separate rheostat from plastic insulator, remove the two electrical wires ... Read more from rheostat, making sure to slide the rubber insulators up on the wire to reuse upon reattachment. On the new rheostat thread wires through the two terminals, then attach wires securely with a small amount solder. Slide rubber insulators back over terminals. I would carefully test toaster before reassembly, it won't shock you without the cover on, reassemble upon satisfactory completion of job.