Water Pressure reduces as I Turn up heat setting

Hi On cold the shower has really high water pressure but as I turn up the temperature the flow reduces and doesn't get as hot as it used to. Anything higher than 7 would be too hot to stand under, now it has to be on 9 to be warm enough for a shower Do you know what the likely cause would be please? Thanks Steve
Asked 5 years ago by Steve
The temperature and flow rate are always (Nearly always!! and always in your type of shower) connected.

When you turn your shower on you have a 7.5kw, 8.5kw, 9.5kw or 10.5kw element heating the water and this does not vary. The way you alter the temperature is by varying the amount of water that passes over the element, pass the water over the element slowly (a little water) and it gets very hot, pass it over quickly (a high flow rate) and it doesn’t have time to pick up much heat.

This explains why in the winter at the same setting as the summer the shower is not so hot because the temperature of the incoming water has changed.
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 money.


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

Answered 5 years ago by Barrie Seabright

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