I have 2 Harbor Breeze Lakeside II ceiling fans in the same room which are controlled by remote controllers. Neither of them are working. I can turn on 1 fan at the wall switch but cannot change the speed or turn off the light. The other fan does not work at all. I have changed the batteries. I noticed on the inside of the remotes states that the hand unit and receiver codes must match. How do I do this? I can find the code on the hand unit but how do I find the code on the fan unit? PLEASE HELP!