Hampton Bay ceiling fan remote units got 4 dip switches. If the first is on & the other 3 is off then the code is 1000 for that remote unit. The remote control units on different fans in the house needs to be different for proper functioning. So to adjust a remote control to a particular fan receiving unit, locate the receiver beneath the bowl kind of structure on the fan base. Set the dip switches positions on the remote control just like that on the receiver unit. Alternately you can buy a new remote control below.