The title is based on the character "Mr. Goodwrench" who was a mechanic that worked at the Sears auto repair shop and was used in television and print advertisements.
When Jesse White says at the end; "maybe I will repair washing machines." It is an inside joke as Jesse played the ever-idle Maytag repairman from 1968 until 1989, when he went on to become a consultant for the Maytag Company.