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Shower goes hot and cold

We have a Mira Extra shower and a combi boiler. It has worked for years with no problems. We have a good hot water supply to bath basin kitchen sink and cloakroom hot taps but when showering it keeps going cold. Is it the shower if so what is it and how do we correct it.

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If you are having trouble only at the one fixture (shower), and no where else, the problem is most likely in the shower valve...which either needs new cartridges, or a complete replacement.
hope this helps

Posted on Jan 08, 2009

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I have a hydramax shower that is fed by combi boiler, the water goes hot and cold i have changed the thermostat cartridge but still have the same problem has anyone any ideas please

Posted on Oct 22, 2013

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We had the same problem. The plumber replaced the flow cartridge & we still got hot & cold showers. He went against the Mira user guide & removed the flow regulator from the hot water inlet pipe. It worked!

Posted on Nov 06, 2012

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