We have 2 harbor breeze fans in our living room. We currently use one remote to control both fans. It was set up that way several years ago by our contractor. One of the lights went out so my husband changed the bulb. Now the remote does not work on that fan. We pulled out the other remote and it works on the fan but not the light. I can not find the directions for the fan so I am at a loss what to do.

Check the frequency settings on both fans and the remote you normally use, to make sure they all match. Beyond that it sounds like you may have a bad receiver in that fan.

http://www.ceiling-fans-n-more.com/ceiling-fan-remote-controls.php