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//www.diynot.com/forums/electrics/redring-650-electric-shower-no-power.382267/
You don't seem to have carried out any of the suggestions mentioned on the above post.
A £10 multi-meter is all you need.
If you do not feel confident or competent to carry out the tests as described then perhaps you should not be replacing the shower yourself and get someone in who knows what they are doing.
Options...
http://www.plumbingplace.co.uk/Mira...html?gclid=CMCJ9--60LoCFfMctAodXUUA4A[/QUOTE]
Thanks for the above advice- I have replaced solenoid valve but this is getting more complicated- and I am pretty sure there is power to the unit-I am thinking of getting an electrician to come and test unit-if he declares unit is faulty well thats it I suppose-
What I could do is to return unit if faulty and therefore I will need to look at another shower as we still have nothng to use at this stage(no bath).