You posted under Maestro fan-light dimer, but don't say what type of wall device this is.
It sounds like electronic switch.
1) Surge might have burned out device electronics.
Turn off circuit breaker and see if device resets itself.
2) Lutron has tech support number
1.888.LUTRON1
(588-7661)
8-8 eastern standard time
3) Help identifying product for ordering online replacement if needed:
http://www.lutron.com/Products/StandAloneControls/Dimmers-Switches/MaestroIRDimmer/Pages/Models.aspx4) Add a comment for more free help.
5) Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.