The Motor Starting Capacitor Starts Your Opener's Motor By Giving It A Boost To Get It Started. When Your Capacitor Is Leaking Fluid Or Has Smoke Coming Out Of It The Opener May Not Start Running. You Will Need To Replace The Capacitor. Opening And Closing The Door To Many Times In A Short Time Period Will Cause The Capacitor To Go Bad.
You May Also Trip The Built-In Motor Protector In The Motor Unit. This Protector Will Reset by Itself After About 15 Minutes In Most Cases.