No matter what bulbs I use in my year old fan they all flicker when fan is on after a few minutes. I have tried many different kind of bulbs.

You would be wise to check the connections at the wall switch, particularly if aluminum wiring is involved.

Then continue upstream to the fan itself to make sure all connections are tight.

Just curious as to why you put Hampton Bay Customer Service in the title. Are you under the impression that this site is somehow connected to HB? If so, why?
We get this a lot. That is why I am asking.