I'm not sure, but if you draw the ven diagram of people that can recognize an issue with their cars heater core (and know what that is) stop and fill the radiator with coolant and the ven diagram of people that would understand what's wrong with their washing machine and attempt a repair themselves is just a circle.

I know the people outside that circle exist, but they really should spend a few minutes learning how things they depend on work, to save a few dollars in their spreadsheet.