I cannot turn the light off with the remote. When the wall switch is on, the remote works properly to control the speed but the light is always on. I have the same fan in another room and the problem isn't the remote because I switched them.

Litex makes Harbor Breeze: 1-800-527-1292
How did you switch the remotes? One remote almost never can control a second fan

You will need to replace the receiver. Does the fan have pullchains?

Ceiling fan remote controls - help and FAQ- Ceiling Fans N More (http://www.ceiling-fans-n-more.com/ceiling-fan-remote-controls.php)