The fan runs great has for years but all of a sudden the light stopped diming tried new bulbs trid new remote what else could it be or what else could I try? Thanks in advance.

Tell me exactly what you did when you got the new remote.

We set the new remote exactly as the old did not work and did not continue to use it. This remote I have has worked fine to dim the light but now stuck on full brightness.

PROBABLY the receiver is failing.

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