Post-2006 Mira Sport 9.0kW electric shower

We have a post-2006 Mira Sport 9.0kW electric shower, fitted in 2006.

Of late it has been necessary to increase the temperature setting more to the right to make the water hotter. This is on the High setting and with the Low Flow lamp unlit, as always.

When increasing the temperature it is normal for the flow from the shower head to diminish, so I understand, but currently the flow is very poor due to the amount of heat we are dialling in, and even then the water is not very hot, certainly not as hot as it used to be.

I've changed the shower head and hose just in case they were blocked but it made no difference to the flow or temperature. The flow when the temperature setting is at its coldest is very strong, as it's always been and diminishes in flow as the control is turned to the hotter settings.

We live in a hard water area in Essex so I'm thinking along the lines that there may be a lime scale build up in the heater tank.

Do you think this is the most likely cause of the problem or is there something else (simpler!) I should be looking for, please?

Thanks in advance for your help.

Asked 9 years ago by Anonymous

It may be a faulty element in the heating tank (there are two, three in most 10kw showers) you can check them with a multi meter you should have a reading of around 12>18 ohms.
If you have power to the elements and no heat it's probably the elements, no power to the elements then it's probably a micro switch.
www.youtube.com/watch?v=wzPt1hsfVq4

If you don’t have a multimeter  we sell them at £10 each with a guide on how to use them for checking and testing the various parts of your shower.

Apart from helping to fix your shower, they are really useful for checking you have a power supply to appliances, for checking fuses, letting you know much power you have left in batteries
(so you know if they are dud or not)  and lots of other jobs, in short they are well  worth the £10.

www.showerdoc.com/installation/electrical-products/SKYTRO-600-005-Digital-Multi-Tester

Answered 9 years ago by Anonymous

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