Mira shower problem. water just flows straight through if ON or OFF?

I have a Mira electric shower. when i turrn the valve on pipe leading to the shower the water just comes straight out the shower whether the shower is switched on or off. the water is cold aswell and when i do switch the shower on and press either high medium or low pressure the service light illuminates????????
Dave, July 2005


done
prime the shower when you take the cover off isolate from electric first making sure you dont spray water on pcb infront cover keep well away from shwer head it worked for me goodluck .

tony, February 2010
Hi did you ever find out what was wrong because i just fitted a mira shower and im having exactly the same problem ???
Regards Gary

Gary, January 2008
link Click here to see other fixes for Mira.