Originally Posted by Cari-in-Oly

This is not necessarily true. The way the old controllers work if you aren't pressing them full on speed racer, if you're only pushing it part way, they turn the unused power into heat so they will get warm. That's kind of an over simplification but it's basically how they work. If it's getting hot it could be that you've been sewing long seams with the pedal only partly depressed. It could also just need to have all the dirt cleaned out of it and be adjusted. Cari