I have ceiling fan. Problem since it was recently installed Light and fan on dimmers. Fan OK. Turn light past half way, turns off in 5 seconds. Turn light less than halfway for a few minutes, will stay on normally. Can adjust dimmer.
Fan has remote feature but not connected.
Switch already replaced.
Assume that I don't need to replace switch, ceiling fan, etc. What might cause this other than a faulty fan/switch? Will contact electrician again but would like some opinions.

Thanks