New shower cartridge?

19 Feb 2009
Reaction score
United Kingdom
I have a Mira 915b (thermostatic) in my en-suite which is used rarely but I noticed yesterday it was only luke warm so I removed the cartridge to check for debris etc and stripped the cartridge down and all seemed fine.

The shower is still luke warm at every setting, the cartridges are £196 so once its fitted and it still dosn't work then I've lost my money.

Is there any way to examine a cartridge to say that its definatly gone?

The hot water and other showers are fine.

To complicate things we've just had a combi fitted as this shower and the other shower were tank fed power showers before, I didnt check the temp of this shower after the guys had gone.

Sorry for the long post and thanks for any replys.
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have you tried resetting the temperature on the dial ?
you have to remove the circlip and turn the hub back.

915b is suitable for combis providing the pressures are not to uneven.

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