I had an issue with my DC25 where the front roller would jam randomly from time to time and eventually stop working altogether. I opened up the whole vacuum, took it completely apart, made sure all the wires were intact, cleaned all the hair (my dogs shed like wow), and the front motor + roller still wouldn't turn on. I was worried about having to replace the front motor, but I decided to replace that reset switch first. And indeed, it worked. phew Saved me over $80