How to Change an Electric Shower

Firstly when you’re having problems with your electric shower don’t attempt to fix it, this is false economy – you’re much better off changing the item completely. Here are a few steps to show you how to change an electric shower. 

• Step One - Safely take off the front cover of the electric shower box. There will be at least 1 or possibly 2 small screws holding this in place. Next, take off the front temperature and control knobs by pulling them straight off (this shouldn’t be too difficult to do). With the front cover off you should be able to see a valve on the water pipe going into the shower unit, it should have a screw slot in the middle of the valve. Turn this a ¼ turn either way and test the shower to see if this has turned off the water. You can use the control knob by temporarily re-attaching it to the shower to get the water to flow.

• Step Two - When changing an electric shower, you must turn off the electric supply at the consumer unit (or fuse board as it’s commonly known). The fuses/trips should be marked but if they’re not, the 1 of 2 possible trips you are going to turn off will be either a 35 amp or a 45 amp depending on the Kilo-watt power of the shower. For a 35 amp fuse/trip, the shower should not be over 8.5 kilowatts. For a shower that is greater in kilowatts, the fuse/trip will be a 45 amp.

• Step Three - The next step in changing your electric shower is to check that the electric has been turned off by either pulling the cord switch in your bathroom or the wall-mounted one outside. Run the shower and make sure that the running water isn’t warm/hot. With the electric turned off, you can put a notice hanging from the consumer unit to warn others not to turn back on.

• Step Four - If the water is now off you can take off the water connection where it connects closest to the unit. Undo the electric cable connections and remove the unit, remembering to replace like-for-like in the kilowatt power rating of the unit (this rating can be found somewhere on the old unit, and on the front cover box of the new one).

• Step Five - When you have connected the new unit to the electric cable and to the water supply, check the water flow through the unit first, then with the cover on the unit you can turn the electric fuse/trip back on. Go back to the unit and turn the wall-mounted switch or pull the cord on, turn up the thermostatic control on the unit and the water control knob to on. Your new shower should be working, but with the new shower unit you will have the manufacturer’s instructions in the box. Follow these carefully, and it should be safe for you to install.

- Mark Lewis

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