The remote for my ceiling has stopped working. Replaced the battery but it still does not work.

There are banks of miniature dip switches in both the hand held unit and the canopy. Any chance a little person might have opened the back of the remote and played with the switches? If you go to Home Depot you can buy a universal remote with a new receiver.

This page has PDFs of Hampton Bay ceiling fan manuals. See if there is a PDF there that helps you if that is what you are looking for.

Also, the remote control and receiver kit can be found on this website as well. In case the home depot is out of stock or any other issue.