Have had previous incidents that my Liftmaster key pad attatched to my Toyota car key pad in my pocket has unknowingly opened my garage door, sometimes overnight. Now I know from upstais in my office just by seeing a little green light that the garage door is closed.
But if there is a red light I just push the button on the monitor to close the door.
Great Product!
My son bought a home that had a worn out garage door opener but your parts were the perfect replacement to get things working again. You tube has some great videos on how to install the gear and sproket assembly. Between that and your quality parts he should be set for years to come.