A:AnswerWe had the same thing happen. For us, the intaller did not like our previous shut off valve and wanted to have a plumber replace it with a new one. We had a plumber come out and take care of it. Then the dishwasher was installed on the second try.
A:AnswerIt is not required if you are replacing an existing dishwasher and install it yourself using the existing water and drain lines. The problem you have is depending on how long the existing lines were installed and if they are in good shape. When using Geek Squad to install any product their policy is to use new lines so they can warranty the work they do. This is the common answer when there is a requirement for installation of any product by any company to warranty work.
A:AnswerRead the warranty. BB will likely blame the third party installation products on a future failure.
When there is a glitch, doing business at Best Buy is very painful, frustrating, and time consuming. If you are persistent, Best Buy will eventually take care of it but it will cost you time, hassle, bureaucracy, and frustration.