When it comes to large, expensive home appliances, it's easy to leave well enough alone and not mess with things until you notice a problem. With regular checks, you can often spot small problems before they become big ones — let's look at your washing machine for example.
Your washing machine is able to fill with water and clean your clothes thanks to its attached supply hose. The hose is less than an inch wide, but is able to dispense water at a rate of about 650 gallons per hour. Because of how small it is in comparison to how hard it works, it can only last for so long. If left unchecked, the hose can give out, burst, and very quickly flood your home costing thousands of dollars in damage.