It is possible to get spares for these showers, but first just ensure it is getting an electrical supply. Check the Fuse or Breaker.
If it appears to be fine, then you should get a electrician to have a look or call Mira to sort it out.
If you have to ask how to fix it the you probably shouldn't. They use a lot of electricity - and you don't want it going through you in the shower.
Ed the plumber
September 2007