Because pianos are made up of as many as 10,000 parts, repairs come in a variety of forms. Piano repair needs are often determined by the quality of the piano and usage. However, piano technicians in Minneapolis/St. Paul have to deal with one of the worst climates in the world for pianos. The extreme humidity changes in this part of the country cause endless problems for a stringed instrument leading to costly repairs, and can reduce the the life expectancy to less than half.
The action mechanism alone has thousands of glue joints that can fail with the swelling and shrinking of wood parts caused by humidity swings of 10% to 90%. In winter soundboards crack, bridges come apart, action parts fail, and tunings don’t last. Summer brings rust and corrosion problems, sluggish swollen action parts, and more tuning instability. See the humidity control
section on this website for more details on how our harsh climate can damage your piano