aqualisa  aquastyle  electric  shower ?
 
                with  water  running  and  up  to  temperature then  suddenly  water  stops  flowing  , no  obstruction  in  hose  or  shower  head  , electrics  in  unit  trying  to  work  but  no  flow  of  water,  could  this  be  a  problem  with  the  solenoid  valve?,
            
             N.Paterson
            
 March 2009