I removed the old sensor bars and replaced them with new ones from AppliancePartsPros.com. Their video made the job of installing the new bars very easy to do. The only slight challenge was re-installing the dryer door. In order to get the old sensor bars out, I first had to remove the dryer door in order to access the two outside screws that help secure the plastic frame that holds the sensor bars. The hinges for the dryer door are connected to strong springs, so re-installing the door was a two-person job (one person to hold the hinges down while the other person moved the door into position with the hinges and re-installed their screws. I needed the pliers to disconnect the wires from the sensor bars. Overall, a very easy job.