I would say it is definitely worth a shot. Contact them via the info. on your warranty card or package if you have it, or find the Fenix Store here on the forum under the manufacturer section. They will need the serial number.
In my past experience, Fenix has had great customer service every time I've needed them, and that is why I have about 10 of their lights. They really do go out of their way to keep their older lights operating, and their customers happy. I'd say that your light is not extremely old, and they may be able to repair. Good luck.