you need a replacememnt safety thermal cut out...the part costs about £4.50 from the manufactuer plus postage so will be about £11.00 bit fiddly to replace but this will solve the problem.
A tip if your not sure what your doing with electrics get a professional in as it is a bit fiddly.
jimme32, May 2009
these showers are so cheap and poorly made you should replace it with an aqualisa, it is usual to get 2yrs out of a galaxy any more is a bonus
kevin the plumber, February 2009
my shower is cold no warm water cummin out the light is on so the power is fine how can i fix it pleases
paul, February 2009
edit
I can answer this question...
galaxy g8000s shower, water remains cold, how can I fix it?