mira shower

Is the service light on ?

If it is then it is likely that you need a new relay board.

If there no lights on at all and no water then you are goingto need a new relay board

If you have water and no lights then youmay have a faulty Thermal Cut Out

A faulty TCO will have no continuity across the twoterminals (The black thing on top of the heating tank)

Therefore a good TCO will have power at both connectionsand a faulty TCO will have power at only one.

(The function of the TCO is, if the water over heatsit cuts the power off to the elements)

Ifthe TCO is OK then It may be a faulty element in the heating tank(there are two, three in most 10kw showers) you can check them with a multimeter you should have a reading of around 12>18 ohms.

If you have power to the elements and no heat it'sprobably the elements, no power to the elements then it's probably a microswitch.

If you don’t have a multimeter  we sell them at £10each with a guide on how to use them for checking and testing the various partsof your shower.

Apart from helping to fix your shower, they are reallyuseful for checking you have a power supply to appliances, for checking fuses,letting you know much power you have left in batteries

(so you know if they are dud or not)  and lots of otherjobs, in short they are well  worth the £10.

http://www.showerdoc.com/installation/electrical-products/SKYTRO-600-005-Digital-Multi-Tester