Harbor Breeze Fan lights go out after 20 minutes
In modern fans there is a current limiter, these devices limit the wattage of the lamps and they do go bad, I have had to bypass them in my personal fans but when on the job they have to be replaced in this case it is cheaper to replace the fan. Some are electronic 3 wire and some are simple 2 wire from what I have found. If changing to a lower wattage lamp won't fix it the current limiter is bad.