I bought a Hunter remote separately and installed to my ceiling fan. Everything works good except the following problem.
I turn on the fan & turn off the light before I go to sleep and in the middle of night the light goes on and fan turns off. This happens a few times until morning when I turn off the swith on the wall. I changed the battery and it is of no use.

Please advise.

Thanks,

You need to change the frequency of the receiver and remote.

Ceiling fan remote controls - help and FAQ- Ceiling Fans N More

Above may help if neighbor on same code, Remove batteries from remote and see if it happens during the night. Perhaps the remote is intermiddently transmitting?