Just had a phone call of a relative asking if i can have a look at her shower as it isnt getting warm enough. Having only spoken on the phone im afraid a can only guess its a power shower, as she describes it as just a simple mixer tap on the wall and has NO electric pull switch anywhere in the bathroom. Also their hot water is heated by a combi boiler. I do not know if there is still a HW cylinder still in use (does a power shower require a HW cylinder or can one work of a combi boiler). So basiclly my question is are there any tips or obvious things to look for that i can be armed with when i go and have a look at it. Sorry to be vague but my knowledge of power showers is very limited 
