Power shower switch problem

[HIF]

I don't know anything about power showers, but I'll try my best to explain the problem me and my housemates are having.
There is a switch one has to turn on in order to make the water run and warm it up. Someone has done something to this switch, so that it's not turning on and off anymore. It's 'on' all the time, but the light doesn't come on so there's no water coming out of the shower. Is there anything I can do to fix this switch?

Thank you,
Hester

 

[bathjobby]

Replace it, but to be honest, the impression you give on your understanding / ability with electrics I would recommend getting an electrician in to take a look at the problem.

me and my housemates

If your renting it is the landlords responsibility.