Disconnect Ability: Ahead of engaged on your garage door opener, disconnect the ability within the breaker or unplug the unit to prevent accidental operation and lower the risk of harm or electrical shock. Signs of a defective limit switch involve the door not opening or closing entirely, reversing course unexpectedly, https://youtu.be/wSkWTAdm-Gg?si=pR5EXdjVuNYjtHN7