I had one where I went to the house because the customer said there new refrigerator wasn't making ice and also had no water at the door. When I got there I found out they had no water going to it. The customer had no idea you needed to run water to it for it to work. HELLO!
How about a customer saying the ice and water didn't work...when I got there they had the waterline stuck into one of those 5 gal water jugs you see on water coolers.