If you have an electric shower fitted in your bath or shower room it is inevitable that at some stage you will encounter an issue with it but before you call out an expert electrician or plumber there are a few things you can try first.
Number one, is the showerhead blocked? If you live in a hard water area there may be a build-up of limescale in the showerhead which will stop the water flowing freely and may cause the electric shower to cut out. To fix this problem simply unscrew the showerhead and put it to soak in white vinegar for a few hours. Once clean, rinse through with clean water and reattach to shower pipe.
Number two, the water is lukewarm coming out of the shower. This is very common with electric showers and can be due to a lack of power getting through the micro switch. This can happen when the switch is burned out or otherwise faulty or there is a failing heating element. A switch is not expensive to replace, but an element will cost more.
Finally, if you ever find there is water coming from the bottom of your electric shower, it may be that the Pressure Relief Device has activated. All of the manufacturers have them as a safety device and most of the time, it is just a ball inside the PRD that gets ejected when the pressure builds up inside the heating tank. This is normally caused by a blocked shower head or a kinked shower hose but is easily fixed.