My designer choice ceiling fan remote works to fan and the lights will come on low but I can not get it to raise the briteness. I have another one in the other room it work fine. I want to use that remote to see if it will work the other fan. But I can't remember how to change the transmitter signal to work the other one

As per the previous reply, if you need a new remote try one of these universal remotes and let us know if it worked...

Universal remote replacements for Designer's Choice ceiling fan

If you need a new receiver, there are some receiver kits made by Hampton bay and Hunter that work with most fans. The universal Hampton Bay receiver + remote kit is supposed to work with over 95% of fans (of all brands, not just Hampton Bay).

The light key on many ceiling fan remotes is also a dimmer, try pressing and holding the light key to see if it increases the brightness.