Replace the batteries in the remote control if it won't control the ceiling fan. Use alkaline batteries if battery life seems short. You can identify alkaline batteries by adjectives like "super," "ultra" and "power" on the packaging.
Take a close look at the battery installation on the remote control and verify that the batteries are inserted the correct way. Look for negative and positive designation and labeling.
Turn off the wall switch for the ceiling fan for five seconds and turn it back on again if the remote control is inconsistent in its operation.
Change the DIP switch settings on the remote if you are using more than one remote-controlled fan in the same area and can't control them separately. Turn the power off at the circuit breaker. Open the battery compartment and slide the switches into a unique pattern. Replace the battery and cover. Turn the power back on at the circuit breaker. Press the "Hi," "Med" and "Lo" buttons in that order. Label the remote control for the fan in that room. Repeat with the other remotes.