nicola1101 - the most likely cause is a failed solenoid
valve, but it could also be a loose connection.
If you reveal the model of the shower unit then
it will be easier to help you.
Don't take any notice of people who say it's cheaper
to fit a new shower - this is hardly ever true.
quote]
and this one
solenoid valve has failed....
plumbers that won't repair electric showers because they are unsure how to diagnose faults with them or they are out for an easy job and make a few quid.
as for the cost of parts most my customers are over the moon if i can fix their electric shower as in solenoid valve for the sake of £15 rather than
write their shower off and buy/install a new one and give them a £200 bill.
got me thinking... A punt on a £15 part which is according to 2 sources the most likeley cause could save me the cost of a plumber and /or a replacement shower. So I sourced the part, found (elsewhere on this forum i think) how to replace it and 2 days later I have a working shower again for £18 incl postage. Parts of it were fiddly but never really difficult.
So I'd like to say thanks for the informed answers right at the start of the thread, however...... the 3 pages full of cock dangling point scoring one upmanship that followed were, whilst unintentionally amusing, almost no use whatsoever to the original question. All I needed to take from any of it was the need to match the wattage if i did decide to go for a replacement, the 'prove what you know', 'no you do', 'no you said the stupid thing' competition about who could calculate amps or name a shower was utterly ridiculous and beside the point. You completely forgot there was a customer in search of an answer and got lost down a side alley of your own making.